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558f8ba0795b7b88377941ee1c3e8d89 | the range of the function f(x)=sin -1 [x 2 +1/2]+cos -1 [x 2 -1/2],where [.] denotes the greatest integer function,is 1.{π/2,π} 2.{0,π/2} 3.{π} 4.(0,π/2) | askiitians.com | 2021.25 | [
{
"text": "hi menka, as x^2 is always positive. so x^2 + 1/2 is always greater than or equal to 1/2. so [x^2 + 1/2] can be 0 or 1 (note that inverse of sin is not defined when it's domain is greater than 1) similarly [x^2 - 1/2] can be -1, 0, or 1. please note for the combined [x^2 + 1/2] and [x^2 - 1/2]........ x^2 must be less than 3/2 for inv(sin) to be defined. so [x^2 - 1/2] can take values only -1 or 0. so we can see that when [x^2 + 1/2] = 0, ie when x^2 < 1/2, we have [x^2 - 1/2] = -1. and hence f(x) = invsin(0) + invcos(-1) = 0 + pi = pi similarly, when [x^2 + 1/2] = 1, we have 1/2 <= x^2 < 3/2, and hence [x^2 - 1/2] = 0 and hence f(x) = invsin(1) + invcos(0) = pi/2 + pi/2 = pi. as we have exhausted the entire domain of the function, there can be no other value that f(x) can take. hence in both the cases, f(x) = pi, and hence the range of the function is pi. which is option (3). hope that helps. all the best, regards, ashwin (iit madras)",
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83e38e87f703f8dda760d996aec767ad | please tell me about your engineering classroom coaching in riyadh? | askiitians.com | 2021.25 | [
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"text": "hi neyaz, askiitians is the pioneer in providing live classroom coaching for engineering examinations in riyadh. the experts who are all from iits are taking regular classes online. these experts are having more than 6 years of teaching experience. the researched study materials, test series and dpps and the classes with the experts are producing tremendous results for our students from middle-east. for engineering classroom coaching in riyadh . thanks sunil kumar, iit-d",
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d482631a822d27a65f5238da37918046 | 97. why are endocrine glands called ductless glands? | askiitians.com | 2021.39 | [
{
"text": "answer: explanation: endocrine glands are called ductless glands because they do not have any external duct to discharge their secretions into the blood stream.",
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c2b8ceb11f92373663c581294f9a3257 | find the equation of the normal to the curve x^3+y^3=8xy at the point where it is meet by the curve y^2=4x, other than origin??ans:y=x | askiitians.com | 2021.31 | [
{
"text": "the meeting point of above two curve are (0,0) and (4,4) so we have to find out normal to curve x 3 + y 3 = 8xy at point (4,4) differentiating above equation 3x 2 +3y 2 m = 8y +8xm where m = y’ putting x =4 and y=4 48 + 48m = 32 + 32m 16m = -16 m = -1 slope of normal at (4,4) = -1/m = 1 so equation of normal (y-4) = 1(x-4) so y = x. hope it clears.",
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66dfc4db84f29db4b76161266c3b185d | prove that integral a to b ((bx)-1)^(0.5) equalto b[cos^-1(ab)\_ ((ab)^(0.5))(1\_ (ab))^(0.5)] | askiitians.com | 2021.21 | [
{
"text": "dear shakeel, t: trigonometric functions: sin(x), tan(x), etc. function indefinite integral comments sin x -cos x cos x sin x sec 2 x tan x tan 2 x = sec 2 x - 1 tan(x) - x (sec x)(tan x) = sin x / cos 2 x sec x csc 2 x -cot x cot 2 x = csc 2 x - 1 -x - cot x (csc x)(cot x) = cos x / sin 2 x -csc x tan x -ln cos x cot x = 1/(tan x) ln sin x sec x = (sec x tan x + sec 2 x)/(sec x + tan x) = 1/(cos^2(x/2) - sin^2(x/2)) = sec^2(x/2) / (1-tan^2(x/2)) ln(sec x + tan x), or 2 arctanh(tan(x/2) csc x = (-csc x cot x + csc 2 x)/(csc x - cot x) = = (1/2)(csc(x/2) sec(x/2)) = (1/2)sec^2(x/2)/tan(x/2) ln(csc x - cot x), or ln(tan(x/2)) sin 2 x = (1/2)(1-cos 2 x+sin 2 x) (1/2)(x - sin x cos x) = x/2 - sin(2x)/4 cos 2 x = 1 - sin 2 x x/2 + sin(2x)/4 sin(ax)sin(bx) (1/2)(sin(a-b)x/(a-b) - sin(a+b)x/(a+b)) a ≠ ±b, proof sin(ax)cos(bx) -(1/2)(cos(a-b)x/(a-b) + cos(a+b)x/(a+b)) a ≠ ±b, proof cos(ax)cos(bx) (1/2)(sin(a-b)x/(a-b) + sin(a+b)x/(a+b)) a ≠ ±b, proof x sin(ax) (sin(ax) - ax cos(ax))/a 2 x cos(ax) (cos(ax) + ax sin(ax))/a 2 sinh x cosh x cosh x sinh x tanh x ln cosh x cracking iit just got more exciting,it s not just all about getting assistance from iitians, alongside target achievement and rewards play an important role. askiitians has it all for you, wherein you get assistance only from iitians for your preparation and win by answering queries in the discussion forums. reward points 5 + 15 for all those who upload their pic and download the askiitians toolbar, just a simple to download the toolbar…. so start the brain storming…. become a leader with elite expert league askiitians thanks aman bansal askiitian expert",
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3ef11b84295242e3e2adb27fcdc24540 | the wavelength of incident photons is 0.3.. then the wavelength of photon scattered through 60degrees is? | askiitians.com | 2021.39 | [
{
"text": "dear student, the ccase will be always in this form: l ’ -l=l c (1-cosα) =>l ’ =l+l c (1-cosα) =>l’=0.3+2.42(1-1/2) =>l’=1.51pm cheers!! regards, vikas (b. tech. 4 th year thapar university)",
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3c05098fa28276e4a773de3b296ff63d | sir there are three months are left in iitjee and aieee so how can i manage my time with subjects and doing their problems sir plz tell me????????????????????? | askiitians.com | 2021.21 | [
{
"text": "dear pallavi, three months is an enoungh time to clear jee and aieee both with reasonable ranks. divide the day timings such that u spend more time in the parts of the subjects or chapters in which u feel u are not good enough. you should be cope up with those subjects or the chapters in the time span of the 2 months. the first few days u spend in strenghening ur conceptual knowledge to very precise extent because it is very important for jee and for aieee u should spend these days for praticing along with concepts as the exam tests ur speed. the last 15 days should be psent for revision purpose of both the concepts and also the problems u have solved untill that time. more emphasis should be given for the revision of the chemistry both organic and inorganic as these parts especially the inorganic chemistry requires much of the parts which should remembered. while preparing the time table analize urself properly and do effective work. please feel free to post as many doubts on our discussion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. all the best !!! regards, askiitians experts adapa bharath",
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7a5acf9160e9eac15a84d88eee2a7a21 | what is the different means by which infectious diseases are spread? | askiitians.com | 2021.31 | [
{
"text": "dear student the different means by which infectious diseases spread are: (a)through air:they are also called air-borne diseases. the air carries bacteria, virus and the diseases that can be caused are: common cold, influenza, tuberculosis etc. (b)through food and water:when one eats drinks contaminated food/water, that contains bacteria, vrirns, worm etc. it can cause diseases like cholera 'phoid, hepatitis, (c)trough contact:many diseases spread by contact of infected person with the healthy person, example, fungal infections, skin diseases, scabies etc. (d)by sexual contact:many diseases can be transmitted, example, syphilis, aids. (e)by body fluids:fluids like blood, semen, mother's milk, when infected, can also cause diseases. example, aids. (f)vectors:the organism that spreads a disease by carrying pathogens from one place to another is called vector. example, mosquitoes are vectors that carry pathogens like protozoa. thanks",
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3b533006c579a1dab7ed46f30e916d27 | two wires carrying current are placed parallel to each other.they will exert magnetic force on each other. in absence of any other external force they move towards or away from each other.so does they violate the rule that magnetic force does not do any work | askiitians.com | 2021.43 | [
{
"text": "dear student, no there current carrying wires do not violate the laws, work done in that case is zero. best of luck cracking iit just got more exciting,it s not just all about getting assistance from iitians, alongside target achievement and rewards play an important role. askiitians has it all for you, wherein you get assistance only from iitians for your preparation and win by answering queries in the discussion forums. reward points 5 + 15 for all those who upload their pic and download the askiitians toolbar, just a simple to download the toolbar…. so start the brain storming…. become a leader with elite expert league askiitians thanks aman bansal askiitian expert",
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e978a008c0503ee5ea723bb2ef4e944d | list of medical entrance exams 2015 | askiitians.com | 2021.39 | [
{
"text": "aiims,aipmt,aipvt,afmc,bhu pmt,vmu aicee,cet,mhtcet,comdek uget,keam,upcat,jipmer,goa cet,upmt,aiet,rpmt ,manipal uget,cetppmc,dumet,aicee,aiet,bhu gnm",
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d962320812277c1779f8be75c8ca7d05 | please find below the attached image and answer it...,...................... | askiitians.com | 2021.43 | [
{
"text": "angular momentum of a body with respect to a point is written as ( i would write omega as w) l about a moving point = i cm *w + angular mom. of the com about the point in case of origin it would be =mr 2 w/2 +mvr =3/2*mvr now relative speed of com about point p=v/2 towards left and actual speed= v+v/2 hence on calculating the angular momentum about p both i*w and mvr would have same direction outward the paper plane. hence it would be= mr 2 *w+ m3v/2*r so ratio =4:3",
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d0bfbf8597fb1c99bb9464cf54c33d1b | a point on the curve y = 6x - x 2 at which the tangent to the curve is included at an angle of 45º to the line x + y = 0 is | askiitians.com | 2021.31 | [
{
"text": "dear student dy/dx = 6- 2 x now |6 – 2 x| = -1 -1 / 2= -1 2 x = 7 hence x = 3.5 now you can calculate ordinate",
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a556ebffe20a336835325ba8566688d1 | a ques. in aieee 2011 regarding equation of ellipse has 2 options right(considering-a>b and b>a)...will marks be given to both options? | askiitians.com | 2021.39 | [
{
"text": "same doubt man...even am confused...both shud right ..i suppose..",
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42d1f8b59bebab553981b3b95a367836 | |z-4| represent which region | askiitians.com | 2021.21 | [
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"text": "hello student, well it has to be equated with some thing |z-5|=t will represent a circle. thanks & regards arun kumar btech, iit delhi askiitians faculty",
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4ee88dfe9b6b019f99d62d8d3481342a | hello sir/ma'am, i am a student of class 10 and i have been having a doubt between mitosis and meiosis can you please explain it.... lookinf forward for your reply. thank you!! kanika panwar class 10 student | askiitians.com | 2021.31 | [
{
"text": "dear kanika mitosis is a process of asexual reproduction in which the cell divides in two producing a replica, with an equal number of chromosomes in each resulting diploid cell. meiosis is a type of cellular reproduction in which the number of chromosomes are reduced by half through the separation of homologous chromosomes, producing two haploid cells. following are the differences between mitosis and meiosis: s.n. differences mitosis meiosis 1 type of reproduction asexual sexual 2 genetically similar different 3 crossing over no, crossing over cannot occur. yes, mixing of chromosomes can occur. 4 number of divisions one two 5 pairing of homologs no yes 6 mother cells can be either haploid or diploid always diploid 7 number of daughter cells produced 2 diploid cells 4 haploid cells 8 chromosome number remains the same. reduced by half. 9 chromosomes pairing does not occur takes place during zygotene of prophase i and continue upto metaphase i. 10 creates makes everything other than sex cells. sex cells only: female egg cells or male sperm cells. 11 takes place in somatic cells germ cells 12 chiasmata absent observed during prophase i and metaphase i. 13 spindle fibres disappear completely in telophase. do not disappear completely in telophase i. 14 nucleoli reappear at telophase do not reappear at telophase i. 15 steps prophase, metaphase, anaphase, telophase. (meiosis 1) prophase i, metaphase i, anaphase i, telophase i; (meiosis 2) prophase ii, metaphase ii, anaphase ii and telophase ii. 16 karyokinesis occurs in interphase. occurs in interphase i. 17 cytokinesis occurs in telophase. occurs in telophase i and in telophase ii. 18 centromeres split the centromeres split during anaphase. the centromeres do not separate during anaphase i, but during anaphase ii. 19 prophase simple complicated 20 prophase duration of prophase is short, usually of few hours. prophase is comparatively longer and may take days. 21 synapsis no synapsis synapsis of homologous chromosomes takes place during prophase. 22 exchange of segments two chromatids of a chromosome do not exchange segments during prophase. chromatids of two homologous chromosome exchange segments during crossing over. 23 discovered by walther flemming oscar hertwig 24 function cellular reproduction and general growth and repair of the body. genetic diversity through sexual reproduction. 25 function takes part in healing and repair. takes part in the formation of gametes and maintenance of chromosome number.",
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2a7dbeeb7ed914151caf18a59bdef4ec | industrialization, a potential damage to man. discuss in detail. | askiitians.com | 2021.25 | [
{
"text": "the exploitation of natural resources started to emerge in the 19th century as natural resource extraction developed. during the 20th century, energy consumption rapidly increased. today, about 80% of the world’s energy consumption is sustained by the extraction of fossil fuels, which consists of oil, coal and gas. another non-renewable resource that is exploited by humans are subsoil minerals such as precious metals that are mainly used in the production of industrial commodities. intensive agriculture is an example of a mode of production that hinders many aspects of the natural environment, for example the degradation of forests in a terrestrial ecosystem and water pollution in an aquatic ecosystem. as the world population rises and economic growth occurs, the depletion of natural resources influenced by the unsustainable extraction of raw materials becomes an increasing concern. the resources are under pressure because of: increse in the sophistication of technology enabling natural resources to be extracted quickly and efficiently. e.g., in the past, it could take long hours just to cut down one tree only using saws. due to increased technology, rates of deforestation have greatly increased. a rapid increase in population that is now decreasing. the current number of 7.132 billion humans consume many natural resources. cultures of consumerism. materialistic views lead to the mining of gold and diamonds to produce jewelry, unnecessary commodities for human life or advancement. excessive demand often leads to conflicts due to intense competition. non-equitable distribution of resources. the problems arising from the exploitation of natural resources are deforestation, desertification, extinction of species, soil erosion, ozone depletion, green house gas increase, water pollution, natural disasters etc. the family structure changes with industrialisation. in pre-industrial societies there is an extended family structure spanning many generations who probably remained in the same location for generations. in industrialised societies the nuclear family, consisting of only parents and their growing children, predominates. families and children reaching adulthood are more mobile and tend to relocate to where jobs exist. extended family bonds become more tenuous.",
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82a3dda5e752aeceecefbe05038cbe8d | fill in the blanks. (a) (–8) + \_\_\_\_\_ = 0 (b) 13 + \_\_\_\_\_ = 0 (c) 12 + (–12) = \_\_\_\_ iaemfuewgnuersiojmhnbiorjhmneru | askiitians.com | 2021.25 | [
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"text": "dear student (a) (-8) + 8 = 0 (b) 13 + (-13) = 0 (c) 12 + (-12) = 0 thanks",
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c60fc4c4eb5ce4243a2de1bdc8a366a0 | a square is inscribed in the circle x²+y²-2x+8y=0 whose diagonal are parallel to access and a vertex in the first quadrant is a then oa isa)1 b)√2 c)2√2 d)3 | askiitians.com | 2021.21 | [
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"text": "dear student please write the question in a standard form or attach an image of the question regards",
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f674e3c1b3930764e5a284617f6f1f58 | in youngs double slit experient,if monochromatic light is replaced by white light a) no fringes are observed b) all bright fringes have colours between violet and red c) all bright fringe become white d) only central fringe is white,all other fringes are colured | askiitians.com | 2021.31 | [
{
"text": "if white light is used , central fringe is white and fringes on either side of it are coloured with blue colours nearer to the central fringe and red farther away.",
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e2e0fa30538ee292f7d1dbcde9c72eaf | differentiate tan^-1(cos x/1+sin x) with respect to sec^-1(x) | askiitians.com | 2021.21 | [
{
"text": "hi thanks & regards, arun kumar, btech,iit delhi, askiitians faculty",
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"text": "dear student, please find below in the attached image the solution to your problem. thanks and regards",
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2613678a9849de04ce62614d27d4a01c | sir,can u guide me with top engineering colleges in india for mechanical engineering and with good job opurtunity. thank you | askiitians.com | 2021.43 | [
{
"text": "top colleges in india for mechanical engineering in india in context of job scenario are: iit delhi iit bombay iit kanpur iit kharagpur bits pilani thery have very good placement records for the past few years. in nits too they have got decent placement ofr mechanical nit trichy nit warangal nit suratkal",
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9012941d1fff602d419d46e20d7a75f0 | q)the two blocks in an atwood machine have masses 2kg and 3 kg . find the work done by gravity during the fourth second after the system is released from rest? | askiitians.com | 2021.39 | [
{
"text": "let t be tension in rope and a be accln of blocks since 3kg is heavier one, it will tend to fall due to gravity so, on balancing eqns, we have a= (m 1 -m 2 ).g/(m 1 +m 2 ) t = 2m 1 .m 2. g/(m 1 +m 2 ) so t = 24 n and a = 2 m/sec 2 at 4th second, after free fall , it falls a distance s = 1/2*2*16 = 16 m work done by gravity = mgh = 3*10*16 = 480 j ---- please feel free to post as many doubts on our disucssion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly.we are all iitians and here to help you in your iit jee preparation. all the best. regards, naga ramesh iit kgp - 2005 batch",
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e9df4f62f9b73cf275ff584541104fba | why the sky appears blue in colour? | askiitians.com | 2021.43 | [
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"text": "the sky appears blue due to scattering phenomenon.when light moves through the atmosphere,longer wavelengths pass through it but shorter wavelengths are absorbed by the gas molecules present in the air (blue light has shorter wavelength as compared to others) .the absorbed blue light is then radiated in different directions and the color gets scattered everywhere and thus the sky appears blue. thanks & regards, ruchi shaw askiitians faculty",
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"text": "the blue coulor of sky is due to rayleigh scattering according to which scattering is inversly proportional to wavelength power 4 and hence blue light is of shorter wavelength there fore it scattered the most. thanks & regards mukesh sharma askiitians faculty",
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a72ef1705a8d9b23babf52482cda1f71 | are beryls 3d silicates | askiitians.com | 2021.39 | [
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"text": "oh yes thanks & regards rinkoo gupta askiitians faculty",
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990fc384041a386cba6e6c903682b7e1 | sir i appeared fr nata exam nd scred 93 marks bt i m nt getting a good clg so i m deciding to drop a year is it good to drop a year i appeard fr jee mains paper1 nt fr paper2 i m interested b.arch so is it safe to drop a year..... or clg doesn’t matters our performance matters???? | askiitians.com | 2021.21 | [
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"text": "both college and performance matters, but if you are extra ordinary then in that case even college doesn’t matters. if you are confident regarding your preparation and atleast you can get a good nit next year then you can go for drop.",
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"text": "no its not like that the reputation of a college as well score, both are equally important, you may try at jadavpur uni, kolkata,...............................inderprastha uni, delhi,................................lovely professional uni, phagwara,.................otherwise plan to drop only when you are damn sure to succeed with flying colours.",
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13aef746b68878e77c30e5bac3a203ed | if the angle between the line y–1z–3x2??? and the plane x2y3z4??? is15cos14?????????, then | askiitians.com | 2021.39 | [
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"text": "your question is not clear and seems to be incomplete. please recheck your question andpost it again. thanks and regards shaik aasif askiitians faculty",
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b50fcd5e488c041d6ab7e476555d5599 | c2h5cl +ag gives....................................................... | askiitians.com | 2021.25 | [
{
"text": "in this reaction c2h5cl losses cl to form agcl which is yellow precipitate and c2h5+ carbocations is formed",
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30516b5a652471738b6f1fa258549d59 | find the point of intersection of any question no 6 | askiitians.com | 2021.31 | [
{
"text": "dear student just make the cordinates equal. we will have two variables t and s but we have three equations from making coordinates equal of x , y and z hence find t and s from any two equation and check whether it satisfies the tbird equation or not. if it satisfies then intersecting otherwise skewe",
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13b764f7f5127752278009dcc73745da | hello,i want to know:what is the eligibility criteria for iit-jee 2011?? wating for the reply, with regards, komal phate. | askiitians.com | 2021.43 | [
{
"text": "as of now its 60% only. iit directors have recommended for 70% cutoff , but its not official. so dont worry if u r % is 80% or above bcoz , board cant keep beyong 80% all the best -- regards ramesh now you can win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian.",
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f776389de77f84f1085d1e54b8988a5d | 26. the coordinates of a particle moving in a plane are given by x (t) = a cos (pt) and y (t) = b sin (pt) where a, b (< a) and p are positive constants of appropriate dimensions. then : (a) the path of the particle is an ellipse (b) the velocity and acceleration of the particle are normal to each other at t = p /2p (c) the acceleration of the particle is always directed towards a focus (d) the distance travelled by the particle in time interval t = 0 to t = p /2p is a. my doubt is that option c should be wrong... in the answer key its given to be true which says that the focus is the centre which in no way is visible to me plz confirm.. | askiitians.com | 2021.31 | [
{
"text": "x = acospt y = bsinpt r(position vector) = acospt(i) + bsinpt(j) ..................1 dx/dt = v x = -apsinpt dy/dt = v y = bpcospt v = -apsinpt(i) + bpcospt (j) dv/dt = a x = -ap 2 cospt dv/dt = a y = -bp 2 sinpt a = -ap 2 cospt(i) - bp 2 sinpt(j) a = -p 2 ( acospt (i) + bsinpt (j) ) .....................2 from eq 1 a = -p 2 (r) r is always directrd towards center (0,0) so accleration of particle will always be towards center of ellipse ....",
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"text": "this question has more than 1 answer answer is (a,b,c) x = a cos pt => cos pt = x/a y = b sin pt => sin pt = y/b squaring and adding them we get x 2 /a 2 + y 2 /b 2 = 1 therefore path is an ellipse --------------- (option a is correct) dx/dt = v x = -a p sin pt d 2 x/ dt 2 = a x = - ap 2 cos pt dy/dt = v y = bp cos pt d 2 y/dt 2 = - bp 2 sin pt at time t = pi/2p or pt = pi/2 a x and v y become 0 only v x and v y are left or we can say velocity is along the negative x axis and accelaration along the negative y axis at t = pi/2p , velocity and accelaration are normal to each other , so option b is also correct. at t=t , position of the particle r -> = x i ^ + y j ^ = a cos pt i ^ + b sin pt j ^ and accelaration of the particle is a -> (t) = a x i ^ + a y j ^ = - p 2 [ a cos pt i ^ + b sin pt j ^ ] = - p 2 [ x i ^ + y j ^ ] = - p 2 r -> (t) so the accelaration of the particle is always directed towards origin hence option (c) is also correct please approve !!",
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"text": "my dear sudhesh the focus of the ellipse is not the center and that is what i wish to highlgiht..",
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{
"text": "dear mayank , if you read carefully i said it is towards the origin not the focus , so , i m really sorry , option (c) is wrong , i thought the question was about particle always directed towards the origin , i didn't see the 'focus' part. so option (a) is correct and option (b) is correct. please approve !",
"name": "",
"is_accepted": false
},
{
"text": "yaar sudhesh option c says accn. is directed towards a focus wheras uve proved it to be directed towards te fosuc and seeing the trajectory of particle the focus in no way is the center of the ellipse...",
"name": "",
"is_accepted": false
},
{
"text": "x = a cos pt => cos pt = x/a y = b sin pt => sin pt = y/b squaring and adding them we get x2/a2 + y2/b2 = 1 therefore path is an ellipse --------------- (option a is correct) dx/dt = vx = -a p sin pt d2x/ dt2 = ax = - ap2 cos pt dy/dt = vy = bp cos pt d2y/dt2 = - bp2 sin pt at time t = pi/2p or pt = pi/2 ax and vy become 0 only vx and vy are left or we can say velocity is along the negative x axis and accelaration along the negative y axis at t = pi/2p , velocity and accelaration are normal to each other , so option b is also correct. at t=t , position of the particle r-> = x i^ + y j^ = a cos pt i^ + b sin pt j^ and accelaration of the particle is a-> (t) = ax i^ + ay j^ = - p2 [ a cos pt i^ + b sin pt j^ ] = - p2 [ x i^ + y j^ ] = - p2 r-> (t) so the accelaration of the particle is always directed towards origin hence option (c) is also correct",
"name": "",
"is_accepted": false
}
] |
|
07332c6851280933bfd73479175da134 | a block of mass m is pulled along a horizontal frictionless surface by applying a force at an angle with the horizontal. if the block travels with uniform velocity and has a displacement d and the co efficient of friction is mu, then find the work done by the applied force | askiitians.com | 2021.31 | [
{
"text": "as it is frictionless , then v=constant and a=0, resultant force=0 therefore, fcostheta-f=0 fcostheta=f=mu mg w=fcostheta * s=mu mg*s thank you",
"name": "",
"is_accepted": false
}
] |
|
f784fe9b8ebc3f5ae2605224aab0744e | ecological competition vegetation/ecology/biodiversity/ecosystem/exotic spicies | askiitians.com | 2021.43 | [
{
"text": "random",
"name": "",
"is_accepted": false
}
] |
|
e7a6945537d4a35d8aa35710e01eb168 | write down the names of compounds represented btthe following formulae: (i) al 2 (so 4 ) 3 (ii) cacl 2 (iii) k 2 so 4 (iv) kno 3 (v) caco 3 | askiitians.com | 2021.43 | [
{
"text": "dear student (i) a12(so4)3→ aluminium sulphate (ii) cac12→ calcium chloride (iii) k2so4→ potassium sulphate (iv) kno3→ potassium nitrate (v) caco3→ calcium carbonate thanks",
"name": "",
"is_accepted": false
}
] |
|
c40219ab4356b13a33c88d625479cb4d | a graph is plotted for a real gas which follows vander waal’s equation with pvm taken on y – axis & p on x – axis. find the intercept of the line where vm is molar volume. | askiitians.com | 2021.25 | [
{
"text": "thanks and regards sunil kr askiitian faculty",
"name": "",
"is_accepted": false
}
] |
|
ab1a700b8bd96637786d752a8cac04ec | what is the derivation of the first law of processes ? | askiitians.com | 2021.43 | [
{
"text": "dq = du + dw amar kumar askiitians faculty m.tech iit delhi",
"name": "",
"is_accepted": false
}
] |
|
1f50171492d7cef4a4796328e955ea1b | what is the iupac name of benzoquinone....is it aromatic or not...?? | askiitians.com | 2021.31 | [
{
"text": "iupac name of benzoquinone is :- benzene-1,4-dione . it is aromatic in nature.",
"name": "",
"is_accepted": false
}
] |
|
9f0901a461212d372939db9509691baa | if non-zero numbers a, b, c are in h.p., then the straight line x/a + y/b +1/c = 0 always passes through a fixed point. that point is ? | askiitians.com | 2021.31 | [
{
"text": "hello student, recall that a , b ,c in harmonic progression then b = a / ( 1 +d ) , c = a / (1 +2*d ) from b =a /(1+d ) solve for d = (a-b) /b plug in then c = (ab) / (2a-b) the equation of the line becomes x/ a +y /b + (2a-b) / ab or (x-1)/a + (y+2) /b =0 (1) if each term is zero then equation (1) always holds. so: x- 1 =0 y +2 =0 or x =1 , y= -2 or the line always passing the fixed point ( x= 1 ,y =-2 ) . thanks and regards shaik aasif askiitians faculty",
"name": "",
"is_accepted": false
},
{
"text": "since abc are in hp so b = 2ac/ a+c ab + bc = 2ac multiply by 1/abc both side ab/abc + bc/abc - 2ac/abc =0 we get 1/a -2/b +1/c = o so points are x= 1,y= -2 (1,-2)",
"name": "",
"is_accepted": false
}
] |
|
a048258b037f1740818d9440a0db1b04 | the question is attached (the circled ones) | askiitians.com | 2021.39 | [
{
"text": "hi, i have already answered q. 43 in previous thread. now for q.44, look, the tank is half filled , ie. 12 m^3 is holding 12000 lts of water. (this is also a reality as 1 dm^3 is 1 lts, or 1 m^3 is 1000 lts ) so clearly to accomodate 6000 lts of water we need 6m^3 volume more. but our surface area is 12m^2 i.e. we need ½ m height to accomodate this extra 6000 lts. so ans is 50 cms. for q. 48, the answer is nine. you need to choose the no of flowers from each type of flowers such that, equal no of bunches can be made. i.e. if i choose 2 from carnations than 50 bunches can be made. in order to make 50 bunches from tulips and lillies you need to take 3 tulips and 4 lillies. so 50 bunches of 2 carnations, 3 tulips and 4 lillies can be made. so answer is 9 flowers in a bunch. you may ask that why we are choosing from carnations first, its because it has lowest no. of flowers. also why we didnt choose 1 carnation for our bunch because, choosing 1 carnations means that carnations has a potential of 100 bunches. now if you want to make 100 bunches from 150 tulips you need to put 1.5 tulips in each bunch which is not possible, so we moved to 2. other possible combinations are choosing 4 from carnation, 6 from tulips and 8 from lillies, this will give us 25 such bunches of 18 flowers in each. so the idea is to find 3 nos (which is no of flowers to be taken from each bunch) which will divide , 100, 150, and 200 giving equal quotient (which is no of bunches) .",
"name": "",
"is_accepted": false
}
] |
|
24b29b6f18e76e689a3473ab920145c7 | sir, how much(or how long) a student needs to prepare for iit entrance exam? also, are coaching institutes helpful? | askiitians.com | 2021.25 | [
{
"text": "you need to study min 4 hrs per day if u r preparing in2 yrs.and 6 hrs/day for preparing in 21 yr. coachings are help ful but dont rely on them too much. study from good books and prepare hard. piyush",
"name": "",
"is_accepted": false
}
] |
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a76c50a4d80d9d161c12a6c46107e1c7 | hello....if we can increase the speed of neurotransmission of impulses from optical nerve to the occipital lobes to the brain......can we have faster optial reflexes???.....i mean to ask whether we can see things slower than actual if we increase the speed of neurotransmission.... …...hope someone’s gonna help me.. | askiitians.com | 2021.31 | [
{
"text": "hi kashyap, thank you for asking that’s an interesting question! transmission of impulse depends on the polarisation, depolarization and hyper-polarisation of the membrane potential. increasing the speed means we gonna speed up the flow of ions across the membrane. for that we have to take over the control of membrane channels. opening and closing of the membrane channels also depend on the intensity of stimulus but uptoa threshold level. hope this will help you",
"name": "",
"is_accepted": false
},
{
"text": "we can see the idea but it is fictional. you can't become flash but the reality is that nervous system is responsible fortransmittingimpulses throughout the body. thespeedof anerveimpulse varies with the type ofnerveimpulse the nervous system is sending. some signals such as those for muscle position, travel at speeds up to 119m/s.nerveimpulses such as pain signals travel slower at 0.61m/s.",
"name": "",
"is_accepted": false
}
] |
|
4869349d4d189af102d07ca7504ad2b4 | using laws of exponents, simplify and write the answer in exponential form: 6^15 ÷ 6 ^10 | askiitians.com | 2021.39 | [
{
"text": "dear student by the rule of dividing the powers with same base = a^m ÷a^n= a^m - n then, = (6)^15 - 10 = 6^5 thanks",
"name": "",
"is_accepted": false
}
] |
|
6febee14b83ed667953c5f7c7c58eb94 | which of the numbers a=2^35 and b=(2^34+2^33+2^32+...+2^0) is larger? | askiitians.com | 2021.25 | [
{
"text": "b = (2^34+2^33+2^32+...+2^0) b is in geometric movement. aggregate of n terms in geometric movement is a[ (r^n - 1 )/(r-1) ] here r=2 , a=1 and n=25 substituting the qualities in the above equation 1 [ (2^35 – 1)/(2-1) ] 2^35 – 1 henceforth a=2^35 is more prominent than b",
"name": "",
"is_accepted": false
}
] |
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97a89ce90f291398bd8312e8d2595b06 | focal length of a convex lens is 20 cm which is placed at a distance of 30cm from the apparatus. another lens of 10cm radius must be placed at how much distanceon another side to produce an image: 60cm 50cm 30cm 12cm explain the answer | askiitians.com | 2021.25 | [
{
"text": "hi arpan , der is something missing in ur 2nd part of d queston as for 1st lens u will get a virtual image at 12 cm from d lens but u don't specify d full condition for d 2nd part.....plz check ur source once more...",
"name": "",
"is_accepted": false
}
] |
|
cc777fe3702af49fe80994be0f1fc636 | two paraller long smooth conducting rails separated by a distance l are connected by a movable conducting connector of mass m. terminals of the rails are connected by the resistor r and the capacitor c as shown in fig. a uniform magnetic field b perpendicular to the plane of the rail is switched on. the connector is dragged by a constant force f. find the speed of the connector as a function of time if the force f is applied at t = 0. also find the terminal velocity of the conductor. | askiitians.com | 2021.39 | [
{
"text": "vab=bvl,i1=bvlr,q=c(bvl)vab=bvl,i1=bvlr,q=c(bvl) ∴i2=dqdt=cbidvdt∴i2=dqdt=cbidvdt now,i=i1+i2=bvlr+cbidvdti=i1+i2=bvlr+cbidvdt magnetic forcefm=ilb=b2l2r.v+b2l2c.dvdtfm=ilb=b2l2r.v+b2l2c.dvdt furtherfnet=f−fmfnet=f-fm ormdvdt=f−b2l2rv−b2l2cdvdtmdvdt=f-b2l2rv-b2l2cdvdt ∴∫v0dvf−b2l2rv=∫10dtm+b2l2c∴∫0vdvf-b2l2rv=∫01dtm+b2l2c integrating we get, v=frb2l2[1−1−(b2l2mr+rb2l2c)t]v=frb2l2[1-1-(b2l2mr+rb2l2c)t] terminal velocity in this case is :vt=frb2l2",
"name": "",
"is_accepted": false
}
] |
|
0485c57f1a55a329cbdbeab26caf18e7 | a projectile is thrown with velocity u = 20 m/s + 5% at an angle 60 o . if the projectile falls back on the ground at the same level then which of following can not be a possible answer for range. [consider g = 10m/s 2 ] (a) 39.0 m (b) 37.5 m (c) 34.6 m (d) 32.0 m | askiitians.com | 2021.21 | [
{
"text": "(a) r = (?20?^2×sin???120?^o ?)/g=20√3=?r/r=24u/u =>r = (2×5)/100×200√3=r/r=24u/u 20√3-2√3<r<20√3+2√3 => 31.1 m < r < 38.1 m",
"name": "",
"is_accepted": false
}
] |
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8986865ee05ea0fbb33148a3ca471706 | i am thanking you for giving me to ask a questio. sir, now i have just completed my ii nd year. i wrote eamcet and got a good marks. still it is ok but i am confusing to choose the best branch. i have interest in all branches but which one would have jobs opportunity in future i don't know.please...advice me which branch is now in the better position and will be in future too. | askiitians.com | 2021.43 | [
{
"text": "dear srikanth, ece , cs and mechanical are among the best branches. best of luck plz approve the answer...!!!! cracking iit just got more exciting,it’s not just all about getting assistance from iitians, alongside target achievement and rewards play an important role. askiitians has it all for you, wherein you get assistance only from iitians for your preparation and win exciting gifts by answering queries in the discussion forums. reward points 5 + 15 for all those who upload their pic and download the askiitians toolbar, just a simple click here to download the toolbar…. so start the brain storming…. become a leader with elite expert league askiitians thanks aman bansal askiitian expert",
"name": "",
"is_accepted": false
}
] |
|
a96a508225eac8e18717b44d18ca2251 | define the atomic mass unit. define the atomic mass unit. | askiitians.com | 2021.43 | [
{
"text": "dear student one atomic mass unit is equal to exactly one-twelfth (1/12th) the mass of one atom of carbon-12 . the relative atomic masses of all elements have been found with respect to an atom of carbon-12. thanks",
"name": "",
"is_accepted": false
}
] |
|
b96c025767585f18ecaaf3ce87d141a7 | express the following in exponential form: t × t express the following in exponential form: t × t | askiitians.com | 2021.31 | [
{
"text": "dear student the given question can be expressed in the exponential form as t^2 . thanks",
"name": "",
"is_accepted": false
}
] |
|
71ada31ea6e90e11f7cf3e779440a3ce | discuss in detail hemihomocercal and gephyrcercal caudal fin | askiitians.com | 2021.21 | [
{
"text": "hemi homocercal caudal fins –characterizedbyatailfinhavingtwosymmetrical lobesextendingfromtheendofthevertebralcolumn,asinmostbonyfishes. diphycercal caudal fin – having or designating atail finin which the vertebral column extends to the tip, with symmetrical upper and lower parts, as in the lungfishes.",
"name": "",
"is_accepted": false
}
] |
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9c9695599ea30ccef4afbbac18c4dbc6 | if f(x)=f(x+1/x+2),then f(-x)=f(-(x+1)/(x+2)) or f(1-x/2-x) | askiitians.com | 2021.39 | [
{
"text": "hello vishu, nice question you asked. i think many people get confused over the same. in general the rule is if f(x) = g(x) then f(alpha*x) = g(alpha*x). note in this problem g(x) = f(x+1/x+2) and alpha =-1. so the correct answer is f(1-x/2-x). you just x to alpha*x , you don't apply any brackets etc etc... hope this answers your query. please feel free to post as many doubts on our disucssion forum as you can. we are all iitians and here to help you in your iit jee preparation. all the best!! regards askiitians expert ankit jain- iit bombay",
"name": "",
"is_accepted": false
}
] |
|
8885b503745483aab7448489af367559 | explain the following reaction in the form of a balanced chemical equation “when a srip of copper is dipped in a solution of silver nitrate, silver metal is precipitated and a solution of copper nitrate is produced” | askiitians.com | 2021.39 | [
{
"text": "when a strip of copper metal( in the form of a wire) is released in the solution of silver nitrate, copper being a more reactive metal than silver displaces silver from its compound by forming copper nitrate with a shiny greyish white deposit of silver on the copper strip. 2agno3 + cu ——-> cu (no3)2 + ag wherein ag- silver agno3 - silver nitrate cu - copper cu(n03) - copper nitrate",
"name": "",
"is_accepted": false
}
] |
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dee0652a1f96c68e1c3f26b70e94d439 | is there any chance of getting seat in aieee 2009 4th round counselling for all india overall rank 219205. category(sc) all india 10523, state(andhra pradesh) overall rank 27498 and cotegory(sc) 1306. if any seat doesn't get is there any chance of getting seat at this time in any colleges using aieee 2009 rank in india. | askiitians.com | 2021.31 | [
{
"text": "hi i am sorry to say , but at this rank it wont be a possiblity to get a place in any of the institutes even in the fourth counselling. try taking admission in ur state colleges that take aieee score. list of engineering colleges in andhra pradesh please click on a link below to access complete list of engineering colleges in the region. adilabad engineering colleges anantapur engineering colleges chitoor engineering colleges cuddapah / kadapa engineering colleges east godavari engineering colleges guntur engineering colleges hyderabad engineering colleges karimnagar engineering colleges kurnool engineering colleges khammam engineering colleges krishna engineering colleges mahaboobnagar engineering colleges nalgonda engineering colleges nellore engineering colleges nizamabad engineering colleges prakasam engineering colleges ranga reddy engineering colleges secunderabad engineering colleges srikakulam engineering colleges visakhapatnam engineering colleges vijayanagaram engineering colleges vijayawada engineering colleges west godavari engineering colleges warangal engineering colleges",
"name": "",
"is_accepted": false
}
] |
|
65ff5ffa444f9006b71984e3998c1a0d | a ray of light coming from the point (1,2) is reflected at a point a on the x-axis and then passes through the point (5,3). what are the co-ordinates of point a? | askiitians.com | 2021.39 | [
{
"text": "assume the x-axis to be a mirror. take the image of (1,2) in x-axis i.e(1,-2). as we know that reflected ray when extended back passes through the image of a point on incident ray i.e reflected ray passes through (1,-2) and (5,3). . . .from two point form eqn of refl.ray=5x-4y-13=0. put y=0 . . .point of incidence=(13/5,0). with regards siddharth gupta",
"name": "",
"is_accepted": false
},
{
"text": "hello thanks & regards arun kumar btech, iit delhi askiitians faculty",
"name": "",
"is_accepted": false
},
{
"text": "assume the x-axis to be a mirror. take the image of (1,2) in x-axis i.e(1,-2). as we know that reflected ray when extended back passes through the image of a point on incident ray i.e reflected ray passes through (1,-2) and (5,3). . . .from two point form eqn of refl.ray=5x-4y-13=0. put y=0 . . .point of incidence=(13/5,0). with regards harsh panwar iit roorkee air 55",
"name": "",
"is_accepted": false
},
{
"text": "assume the x-axis to be a mirror.take the image of (1,2) in x-axis i.e(1,-2).as we know that reflected ray when extended back passes through the image of a point on incident ray i.e reflected ray passes through (1,-2) and (5,3)....from two point form eqn of refl.ray=5x-4y-13=0.put y=0 ...point of incidence=(13/5,0) aman bansal air1",
"name": "",
"is_accepted": false
},
{
"text": "a ray of light passing through the point p( 1 , 2 ) reflects on the x - axis at the point a and the reflected ray passes ... ∴m 1 =-m 2 . let coordinates of point a is (a,0). then , 2 -0 1 -a=- 3 -0 5 -a ... a ray of light coming fromthe point ( 1 , 2 ) is reflected at a.",
"name": "",
"is_accepted": false
}
] |
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56aada80643281e54c018e09af51e29c | an adolescent covers individuals from (a) 5-10 years (b) 12-18 years (c) 10-15 years (d) 10-20 years | askiitians.com | 2021.21 | [
{
"text": "(a)",
"name": "",
"is_accepted": false
}
] |
|
425d843efefc42d38609e970c8ce3f75 | sir, i got air-2095 in iit-jee. i have too many questions to ask ? 1. what should i prefer-college or branch | askiitians.com | 2021.25 | [
{
"text": "dear yashanshu, based on my personal experience you should prefer college over branch and when you will be passing out of college you will get know preferring college over branch is a better idea. please feel free to post as many doubts on our discussion forum as you can.we will get you the answer and detailed solution very quickly. all the best. regards, askiitians experts sagar singh-iit delhi",
"name": "",
"is_accepted": false
}
] |
|
86109e0ac66e4ee8f5bcf7ab1de0e8b8 | when capacitor is connected in a conduccting circuit it reduces voltage fluctuations or total voltage | askiitians.com | 2021.25 | [
{
"text": "for example, in an rc circuit, the capacitor eventually gets fully charged to battery voltage v, but if capacitor were not there and only resistor and battery were present, voltage can chenge instantaneously.therefore, answer is, capacitor reduces voltage fluctuations. in a similar way, inductor reduces current fluctuations.",
"name": "",
"is_accepted": false
}
] |
|
93a723fcfb7dc0263ce0c6451ccca8ab | if the frequency of incident light on a photoelectric metal keeping the intensity constant then whathappens to is kinetic energy | askiitians.com | 2021.31 | [
{
"text": "kinetic energy will remain constant because it is independent of intensity of light it depends on the frequency of radiation thanks and regards sunil kr askiitian faculty",
"name": "",
"is_accepted": false
}
] |
|
6f5a5afb399b05c85bd5742f5a58a55c | ice of mass 2kg at -20°c and 5 kg of water at 20°c are mixed (specific heat of water = 1 cal/g°c ,specific heat of ice = 0.5 cal/g°c).find the net amount of water in the container. | askiitians.com | 2021.43 | [
{
"text": "let the mass of ice converted to water be m. so, 1000ml = (5+m)1000 x 1 x (t-293)",
"name": "",
"is_accepted": false
}
] |
|
fa9d6f7a87001973cca5bdd8ffb6a5a5 | what will be the eligibility of iit-jee 2012? will a pcm of 70 and board percentage of 75% be enough to give jee 2012? will it still remain 60%? the discussions of a single examination for all eng examinations will it be implemented this year itself? | askiitians.com | 2021.39 | [
{
"text": "do not think more about eligibilities ...concentrate in your studies and work hard to crack jee or aieee.",
"name": "",
"is_accepted": false
}
] |
|
0fe80bf13d460d2644d754cd544cfdcf | why angle of incidence of the prism can not be less than 30 degree to obtain minimum deviation position | askiitians.com | 2021.39 | [
{
"text": "there is an angle of incidence at which the sum of the two deflections is a minimum. the deviation angle at this point is called the \"minimum deviation\" angle, or \"angle of minimum deviation’. at the minimum deviation angle, the incidence and exit angles of the ray are identical. this is a consequence of the principle of time reversibility; if the incidence and exit angles were not identical, then reversing the paths (exit becomes entrance, and vice versa) would indicate erroneously that there were two incidence angles resulting in minimum deviation. one of the factors that causes a rainbow is the bunching of light rays at the minimum deviation angle that is close to the rainbow angle.",
"name": "",
"is_accepted": false
}
] |
|
ee9c41330711d2a6dc960bd3c1f50a24 | respted sir/madam need ur help.. plz let me noe...is paper-2’s result of jee main i.e b.arch will also be declared on 27 th april only....and is it compulsory to clear cutoff of paper-1 even if we want iit’s for b.arch course....plz reply as soon as possible.... | askiitians.com | 2021.21 | [
{
"text": "only students who have qualified the jee mains are allowed to sit for jee advanced. if a student wants to join b.arch in iit kahargpur and iit roorkee , he/she has to first clear jee mains parer 1 (not paper 2 ; paper 2 is only for admission to b.arch in nits and spas). also, only those candidates who would have given b. arch program (availableat iit kharagpur and iit roorkee) as one of their choices while filling their choices will be eligible to take the architecture aptitude test.",
"name": "",
"is_accepted": false
},
{
"text": "ya both results will be declared together but the date is not confirmed yet",
"name": "",
"is_accepted": false
}
] |
|
2fbd3b1536df83a6bf8171c44cf76cd9 | a particle of mass 1 gram and charge 5 microcoulomb is thrown at a speed of 20 m per second against a uniform electric field strength 2 x 10 to the power 5 newton per coulomb the distance travelled by the particle before coming to rest.a)0.1 b)0.2 c)0.3 d)0.4 | askiitians.com | 2021.43 | [
{
"text": "q = 5*10 -6 c. v = 20m/s. m = 10 -3 kg. e= 2*10 5 n/c. let distance travelled is d. then, qed = (½)mv 2 . then d = 0.2m. hope it clears. if you like answer then please approve it.",
"name": "",
"is_accepted": false
}
] |
|
50af3f359eca2140b691368d354bfced | which is the best branch in iit | askiitians.com | 2021.25 | [
{
"text": "based on placements, computer science is the best branch in the iits so far. however there is a recent trend emerging where electrical and mechanical engineering have been getting increased pay packages in the last 1-2 years.",
"name": "",
"is_accepted": false
},
{
"text": "mechanical",
"name": "",
"is_accepted": false
}
] |
|
e50a0cab0110df5deeeda760bbcb91d3 | atomic weight of ne is 20.02 . ne is mixture of ne20 and ne22 relative , abundance of heavier isotope is ; (1) 90 (2) 20 (3) 40 (4) 10 | askiitians.com | 2021.31 | [
{
"text": "there is some discrepancy in the question. if the atomic weight of neon given in the question is 20.2 then your answer is option 4]10. please check it because 20x+22[100-x]/100 =20.2 20x+2200-22x =2020 180-2x =0 2x=180 x =90 % if x= 90% then abundance of heaver isotope is 100-x =100-90= 10% if 20.02 then 20x+22[100-x]/100 =20.02 20x+2200-22x =2002 198-2x =0 then on solving for x x= 99% then abundance of heavier isotope is 100-99=1% please check your question if the weight given is 20.2 or 20.02 please approve my answer",
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"is_accepted": false
}
] |
|
771d68c795f03fa25e319d95b961157d | there are chances of my daughter getting around 230 marks in iitjee 2010 she will get into merit list are there quota for qualified girl candidates for seats in various courses in iits | askiitians.com | 2021.21 | [
{
"text": "dear sir, we are happy to see that parents put in so much efforts to ensure best career for their children. your daughter has secured a decent score, she will qualify jee if she gets around 230, her rank will be somewhere in a range of 3000 to 4000.. http://www.askiitians.com/iit-jee-2010-cut-offs.aspx please have a look at what courses she might get http://www.askiitians.com/iit-jee-2009-rank.aspx but there is no such provision of quota for girls in any branch or iit... i hope i have solved your query.. feel free to ask more questions and encourage your daughter to participate in the forums and boost her confidence. wish her a very good luck..!! regards, askiitian expert charu nigam",
"name": "",
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}
] |
|
14110ddbf141b896f6293d37f2fed800 | i am getting 284 marks | askiitians.com | 2021.31 | [
{
"text": "dear aashish goyal your pridicted rank is 750-900. this rank is pridicted based upon last year result,and after after analysis of difficulty level of jee 2009 and jee 2010 paper. best of luck regards badiuddin",
"name": "",
"is_accepted": false
}
] |
|
e03aec33d65b2e52d9fcad81360f59a7 | antipyretic and analgesics | askiitians.com | 2021.39 | [
{
"text": "antipyretic and analgesics :- an antipyretic is a during which is responsible for lowering the temperature of the feverish organism to normal but has no effect on normal temperature states. the central nervous system, especially the hypothalamus, plays an important role in maintaining the balance between the heat production and heat loss in order to regulate the body temperature. hypothalamus is, thus, known as the thermostat of the body. in cases of fever, there still exists the balance between heat loss and heat production but the thermostat is only set at a higher temperature. the antipyretic drug helps to reset the thermostat at normal temperature. heat production is not inhibited but heat loss is increased by increased peripheral blood flow which increases the rate of perspiration. this causes body to loss heat and subsequently lower the body temperature. aspirin is an important antipyretic. the other antipyretics are phenacetin, paracetamol, novalgin and phenyl butazone. aspirin is absorbed from gastrointestinal tract. the stomach acid causes a partial hydrolysis of the easter. the easter circulates in the blood and further hydrolysis occurs into salicylic acid which is the active components. it causes several side effects. it may cause minute ulcers in the stomach and cause bleeding. aspirin should not be taken empty stomach. some persons are allergic to aspirin. the usual allergic reaction is rashes on skin, lowerin of blood pressure, profuse sweating, intense thirst, nausea and vomiting. calcium and sodium salts of aspirin are more solube and less harmful. aspirin is also used to prevent heart stroke because it acts as vaso dialator. the derivatives of p amonophenol are used as antipyretic. the main limitation of these derivatives is that they may act on red blood cells and thus, they may be harmful in moderate doses. it is highly toxic and hence not considered as a safe drug. oxyphenyl butazone is less toxic and is used in place of phenylbutazone.",
"name": "",
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}
] |
|
cbd10dc69f2624066eae2d88d9f11a65 | i am scoring 304 in aieee 2010 what rank can i get? plz also tell the which is the best nit? thank u sir | askiitians.com | 2021.25 | [
{
"text": "hi sonali, askiitians provide the aieee cut off, aieee paper solutions, aieee paper analysis, opening and closing rank of all the nit’s …. click the given link for opening and closing rank aieee http://www.askiitians.com/aieee/aieee-counselling please click the link for aieee cut off : http://www.askiitians.com/aieee-2010/aieee-2010-cut-offs.aspx and for paper solutions : please click for paper solutions: http://www.askiitians.com/iit-jee-2010-solutions/ aieee paper analysis: http://www.askiitians.com/aieee-2010/aieee-2010-paper-analysis.aspx please feel free to post as many doubts on our disucssion forum as you can. if you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. we are all iitians and here to help you in your iit jee preparation. askiitians expert amit it bhu",
"name": "",
"is_accepted": false
}
] |
|
6c9e8b14285e35bdc52bf109325cb6ae | 82. define ozone hole. [doe] | askiitians.com | 2021.43 | [
{
"text": "answer: explanation: decline in the thickness of ozone layer in antartica is termed as ozone hole.",
"name": "",
"is_accepted": false
}
] |
|
3af53e875acf83a2e9487c492d6c7ed6 | the function f(x) = [x] 2 – [x 2 ] is discontinuous at (1999) 1. all integers 2. all integers except 0 and 1 3. all integers except 0 4. all integers except 1 | askiitians.com | 2021.31 | [
{
"text": "dear student the answer is d) all integers except 1 regards",
"name": "",
"is_accepted": false
},
{
"text": "dear studentthe answer isd) all integers except 1regards thanks best of luck. have a nice day.........................",
"name": "",
"is_accepted": false
},
{
"text": "dear student let x=n∈z left hand limit : let h is very approx. 0 limh→0+[n+h]2−[(n+h)^2] limh→0+n^2−n^2=0 hope this will help good luck",
"name": "",
"is_accepted": false
}
] |
|
c7ee836f1b6900df2be12ac9d4d0487b | two charges 9e & 3e are placed at a distance r. thedistance of the point where the field intensity will be zero is | askiitians.com | 2021.21 | [
{
"text": "consider a point at a distance x from charge 9e assuming that electric field intensity is zero at that point. k(9e)/xsquare + k(3e)/(r-x)square =0. by solving this we get x=0.634.",
"name": "",
"is_accepted": false
}
] |
|
72a61348d107bd97788153aef656ebf9 | successive discount of a percent and b percent are equivalent to a single discount of ? | askiitians.com | 2021.21 | [
{
"text": "dear student it will be a + b - ab /100 hope it helps in case of any fofficudif please feel.free to ask again regards arun (askiitians forume xpert)",
"name": "",
"is_accepted": false
},
{
"text": "if m is the marked price then the selling price is (1-a/100)(1-b/100)×m. thus if m=100, sp=(1-a/100)(1-b/100)×100. hence, discount=(m-sp)=100-sp => d(%)= (m-sp)/m ×100= 100-sp.",
"name": "",
"is_accepted": false
},
{
"text": "let suppose be the price of material to be100 for a%discount=100-100*a% =100-a for again b%discount=(100-a)-(100-a)*b% =100-a-b+(ab)/100 net discount=(initial cost-final cost)*100/initial cost = (100-100+a+b-(ab)/100)*100/100 finally=a+b-(ab/100)",
"name": "",
"is_accepted": false
}
] |
|
22d872376ae128e8e1c438f00d270814 | <p>sir, i just wanted to know that if a student starts preparing for iit-jee 2011 sincerely from now that is from mid may can he/she crack iit with under 1000 rank? if yes,then what sincere efforts are actually required to make it possible? can u plz also give me a syllabus break up of the three subjects for the coming months so that i can cover my topics as per the allotated time ? actually sir i m in 12th now and i feel i didnt learn that all required for jee inspite of joining a coaching centre and one full year has gone now . i will be really thankful for your advice since very less time is left and i feel it is impossible for me to crack jee-2011 with a good rank.</p> | askiitians.com | 2021.43 | [
{
"text": "i hope the query is resolved.",
"name": "",
"is_accepted": false
}
] |
|
e26756b63195ae2456510aee355da62d | how to calculate vector products like (a*b)*(c*d) where * represent cross products | askiitians.com | 2021.31 | [
{
"text": "to calculate such product take a*b=m and then solve and later replace m by a*b a*b=m hence m*(c*d) solve by vector triple product",
"name": "",
"is_accepted": false
},
{
"text": "to calculate such product take a*b=m and then solve and later replace m by a*b a*b=m hence m*(c*d) solve by vector triple product.",
"name": "",
"is_accepted": false
}
] |
|
03065faedb7b48ad65d2602d5784e396 | how many valence electrons does krypton have? a 36 b 6 c 8 d 4 e 10 | askiitians.com | 2021.25 | [
{
"text": "krypton has atomic number 36 and electron configuration. 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 1 0 4 s 2 4 p 6 the valence shell of krypton is 4th, hence, there are 8 electrons in this valence shell. hence, the correct option is c.",
"name": "",
"is_accepted": false
}
] |
|
46c9892eaf37d4318b7314b78c8c222c | assertion : amphibian heart consist of two auricle and one ventricle. reason : the deoxygenated blood is returned to heart through sinus venosus. (a) if both the assertion and reason are true andreason explains the assertion.(b) if both the assertion and reason are true butreason does not explain the assertion.(c) if as ser tion is true but rea son is false.(d) if assertion is false but reason is true please explain the solution in detail. | askiitians.com | 2021.31 | [
{
"text": "the correct answer is (a)if both the assertion and reason are true andreason explains the assertion. amphibian hearts have 2 atria and one ventricle. this provides some separation between oxygenated and deoxygenated blood, although the two types of blood mix in the ventricle.",
"name": "",
"is_accepted": false
}
] |
|
8946e5f2a85a6b12413250ed7ceb06db | pls solve rc mukherjee qno 16 from ionic equilibrium chapter | askiitians.com | 2021.25 | [
{
"text": "dear student, could you please post the question on the forum... please feel free to ask your queries here. we are all iitians and here to help you in your iit jee preparation. all the best. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar.. askiitians expert sagar singh b.tech, iit delhi [email protected] on addition of aq. naoh to an aq. solution of salt r, a white ppt. is obtained, soluble in an excess of the hydroxide. a white ppt. is also obtained when r is treated with aq nh3, but it is insoluble in excess of it. please feel free to ask your queries here. we are all iitians and here to help you in your iit jee preparation. all the best. win exciting gifts by answering the questions on discussion forum. so help discuss any query on askiitians forum and become an elite expert league askiitian. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar respectively : click here to download the toolbar.. askiitians expert sagar singh b.tech, iit delhi [email protected]",
"name": "",
"is_accepted": false
}
] |
|
f9b386f77bfc915a0f20bd9cd2f6033f | what is the colour of cus ??????????????????????????????? | askiitians.com | 2021.39 | [
{
"text": "dear student the colour of cus is black",
"name": "",
"is_accepted": false
},
{
"text": "copper monosulfide is a chemical compound of copper and sulfur. it occurs in nature as the dark indigo blue mineral covellite. it is a moderate conductor of electricity. a black colloidal precipitate of cus is formed when hydrogen sulfide, h 2 s, is bubbled through solutions of cu(ii) salts.",
"name": "",
"is_accepted": false
}
] |
|
7b415f7e683a50b6ec2fdd1a91f8652d | select the water-borne disease out of the following (a) cholera (b) tuberculosis (c) dengue (d) malaria | askiitians.com | 2021.43 | [
{
"text": "(a)",
"name": "",
"is_accepted": false
}
] |
|
27dfade5e5d7d4acfb4d57e6fc3fabaa | the sides (in meters) of a box joining at origin are represented by vectors a= 4i, b= 2i + 3j and c= i+k. the surface area of the box is | askiitians.com | 2021.31 | [
{
"text": "surfce area is a vector. so, you do cross product. the ans is 2×{(a×b)+(b×c)+(c×a)}",
"name": "",
"is_accepted": false
}
] |
|
15452603af6f275ccd26525a572f3b2e | i am confused between 2 programs offered by fiitjee. they offer classroom program and an integrated program. my study centre would be delhi (south). which program is more preferred and why. | askiitians.com | 2021.43 | [
{
"text": "faculty will be same. course covered will be almost same. study material will be almost same. integrated study material will contain boards+jee. whereas classroom study material contain only jee. the main difference comes in time. in classroom programe you have to attend school and coaching differently whereas in integrated they are same. so everyday you can save 1–2 hrs if you join integrated. and this 1–2 hrs are very crucial. so opt for pinnacle course (integreted).",
"name": "",
"is_accepted": false
}
] |
|
13fceb193504687f354635482feab233 | is passive immunity and passive immunisation the same thing? | askiitians.com | 2021.25 | [
{
"text": "whereas active immunity refers to the process of exposing the individual to an antigen to generate an adaptive immune response, passive immunity refers to the transfer of antibodies from one individual to another. passive immunity provides immediate but short-lived protection, lasting several weeks up to 3 or 4 months.",
"name": "",
"is_accepted": false
},
{
"text": "hey friend whereas active immunity refers to the process of exposing the individual to an antigen to generate an adaptive immune response, passive immunity refers to the transfer of antibodies from one individual to another. passive immunity provides immediate but short-lived protection, lasting several weeks up to 3 or 4 months. thank u",
"name": "",
"is_accepted": false
}
] |
|
07dbca0cdfeaedc72a6461a82dab0ad5 | a cycle consisting of one constant pressure,one constant volume and two isentropic processes is known as | askiitians.com | 2021.31 | [
{
"text": "diesel cycle sher mohammad b.tech, iit delhi",
"name": "",
"is_accepted": false
}
] |
|
1b9316e526e165b5e4893739e30d9bf5 | sir, i have qualified in iit jee 2010 with air 8219. sir,my other entrance examinations are not upto mark and due to fee structures i cannot take admission in few ones. in fact i have decided to take admission in iits if i could get a seat in them. so.sir please guide me about the branches and the respective colleges i could get out of this rank. please reply as soon as possible. i need your help. ajitesh ranjan | askiitians.com | 2021.43 | [
{
"text": "dear student, pls check opening and closing rank of college and branch that you want to take admission in on their official website",
"name": "",
"is_accepted": false
}
] |
|
3f8da22dbe0723a5d562c25b23243bb7 | which combination will give the strongest ionic bond? (a) ca2+, o2- (b) ca2+, cl- (c) k+, o2- (d) k+, cl- | askiitians.com | 2021.21 | [
{
"text": "d.",
"name": "",
"is_accepted": false
},
{
"text": "ans (a)",
"name": "",
"is_accepted": false
}
] |
|
950f8230714b942429b96c12da774ffd | how can i use taylor series of expansion | askiitians.com | 2021.39 | [
{
"text": "a taylor series is a series expansion of a function about a point. a one-dimensional taylor series is an expansion of a real function about a point is given by 1) evaluating definite integrals here is an example. suppose we want to evaluate the definite integral 2) understanding asymptotic behaviour taylor series can tell us useful information about how a function behaves in an important part of its domain. here is an example a famous fact from electricity and magnetism says that a charge q generates an electric field whose strength is inversely proportional to the square of the distance from the charge. that is, at a distance r away from the charge, the electric field is e = kq / r 2 where k is some constant of proportionality. 3) understanding the growth of functions 4) solving differential equations",
"name": "",
"is_accepted": false
},
{
"text": "if a function has continuous derivatives up to (n+1) th order, then this function can be expanded in the following fashion: where , called the remainder after n+1 terms, is given by: when this expansion converges over a certain range of , that is, , then the expansion is called the taylor series of expanded about . you can use taylor series to find out the limit of various expressions.consider the expression as f(x) in the given definition and write x as x+h where h tends to zero.generate the taylor series or expand it and put h=0 finally after all simplifications and the result will be the limit of the expression under consideration. but always be very careful towards the definitions and conditions for existence of the taylor expansion of any expression.!!!!!!!!",
"name": "",
"is_accepted": false
}
] |
|
04ee06c7f01a585188f82e43bbb6e376 | a rectangular city is divided by streets into squares. there are n such squares from north to south and k squares from east to west. find the number of shortest walks from the north-eastern end of the city to the south-western end. | askiitians.com | 2021.31 | [
{
"text": "dear student as there are n squares from north to south and k squsres from east to west. hence there are n+1 and k+1 lines respectively. hence total required ways = (n+k+2)! /( n+1)! (k+1)!",
"name": "",
"is_accepted": false
},
{
"text": "but the answer given is (n+k) c k. ...................??..??....?.???!! /?.................).. c......",
"name": "",
"is_accepted": false
},
{
"text": "oh sorry we count from 0. hence (n+k)!/ n! k! or we can also say n+k c k or n+k cn. hope now you understand",
"name": "",
"is_accepted": false
}
] |
|
9618556e0a39f41562f98d909b77b1d7 | what criteria do we use to decide whether something is alive? | askiitians.com | 2021.25 | [
{
"text": "dear student movement in response to external stimuli, breathing, growth etc. thanks",
"name": "",
"is_accepted": false
}
] |
|
8a9f89eae3438fcbf79c44f870939931 | which tissue transports photosynthates? what experiments prove this? | askiitians.com | 2021.25 | [
{
"text": "phloem, the living vascular tissue transports photosynthates in the form of sucrose. phloem transports food from the leaves upwards and downwards. thus it is bidirectional. a simple experiment called 'girdling experiment' explains transportation of food.",
"name": "",
"is_accepted": false
}
] |
|
2dd6ad393786798c2a838dc911fb86ec | which branch is the best?ece or cse | askiitians.com | 2021.21 | [
{
"text": "cse because the chances of getting job after graduation is much higher then the ece. also the package will be comparatively higher.",
"name": "",
"is_accepted": false
},
{
"text": "cse is the best for future scope . 1)job oppurtunities 2)job salaries 3)job security 4)job effeciency in my point of view. the first is ur interest take what u want but my sincere advise is to take cse",
"name": "",
"is_accepted": false
}
] |
|
62dd4f1bd3c53e8b8f7e6dbc83d9cca9 | if two slits 1 2 are seprated by 3 m and initial phase diff is 0 .when a minima is obtain in front of slit 2 such that line joining thr two slit is perpendicular to that minima find frequency of slit if velocity is 330m/s | askiitians.com | 2021.39 | [
{
"text": "as we know that phase difference = wavelength/d pi/2 = wavelength /3 wavelength = 3pi/2 hence, frequency = velocity * wavelength = 330 x 3pi/2 = 165 *3 pi = 495 pi",
"name": "",
"is_accepted": false
}
] |
|
2f102b19fa1155b265117af40b8f9ff7 | can anyone tell me what is the cut off for mechanical in top nit's like surathkal,warangal,trichy etc.please also tell the marks that are required to get in top 7500 | askiitians.com | 2021.43 | [
{
"text": "estimated rank for aieee 2010 expected marks expected rank above 375 top 10 375 - 330 10 - 500 330 - 300 500 - 1000 300 - 255 1000 - 5000 255 - 225 5000 – 10,000 225 - 195 10,000 – 20,000 195 - 175 20,000 – 30,000 175 - 150 30,000 – 50,000 150 - 125 50,000 – 75,000 < 125 >75,000",
"name": "",
"is_accepted": false
}
] |
|
876e7f994f57df8c01230a7ca684749c | the coefficient of transmission and coefficient of reflection for a given body at a given temperature are 0.33 and 0.64 respectively. then the coefficient of emission of the same body at the same temperature will be (a) 0.3 (b) 0.003 (c) 0.03 (d) 0.33 | askiitians.com | 2021.21 | [
{
"text": "dear student 0.33+0.64+x=1 x= 0.03 regards",
"name": "",
"is_accepted": false
}
] |
|
5a4a7da62b8dd8a21e0cdd22c7c84e96 | can you depict the movement of a honybee by a distance time graph. | askiitians.com | 2021.39 | [
{
"text": "the graph will be full of curves and will finally come to 0 again. -------------------------------------------------\\_----",
"name": "",
"is_accepted": false
}
] |
|
e830651e8ed262d9efa884d15a184d51 | rishi bhatt in jfet when we plot graph between vds and id then vgs can be positive or negative . now as the input junction is to be reverse bias (consider n channel jfet). now as per the positive and negative sign , is we have to change the polarity of the vgs. rishi bhatt | askiitians.com | 2021.25 | [
{
"text": "dear rishi, in case of reverse bias the current id is almost zero so we need to keep v gs posetive, best of luck...!!!! cracking iit just got more exciting,it’s not just all about getting assistance from iitians, alongside target achievement and rewards play an important role. askiitians has it all for you, wherein you get assistance only from iitians for your preparation and win by answering queries in the discussion forums. reward points 5 + 15 for all those who upload their pic and download the askiitians toolbar, just a simple to download the toolbar…. so start the brain storming…. become a leader with elite expert league askiitians thanks aman bansal askiitian expert",
"name": "",
"is_accepted": false
}
] |
|
7c9d52649af8940a226d37f49a840aea | 7. why is it difficult to hold a school bag having a strap made of a thin and strong string? | askiitians.com | 2021.43 | [
{
"text": "it is difficult to hold a school bag having a thin strap because the pressure on the shoulders is quite large. this is because the pressure is inversely proportional to the surface area on which the force acts. the smaller is the surface area; the larger will be the pressure on the surface. in the case of a thin strap, the contact surface area is very small. hence, the pressure exerted on the shoulder is very large.",
"name": "",
"is_accepted": false
}
] |
|
b052312d5253028fd269320abae9ff55 | calculate the area enclosed between the curves y = x 2 and y 2 = x. | askiitians.com | 2021.25 | [
{
"text": "ans: hello student, please find answer to your question below y = x 2 , y 2 = x intersection of the curves x 4 = x x = 0, 1 area b/w curves ‘a’",
"name": "",
"is_accepted": false
}
] |
|
5c72b3e2ad55fe84ce7892a9b94a760e | plz solve this ques.... | askiitians.com | 2021.25 | [
{
"text": "pinacole means a compund which is havind 2oh as the functional grouts therfore a compound having diols type correct answer is b approve if useful",
"name": "",
"is_accepted": false
},
{
"text": "answer is b)2,3 dimethyl, 2,3 butanediol all vicinal diols are pinacols vicinal diols means two oh groups on adjacent carbons these are prepared by treating ketones with mghg/nahg + water approve if useful",
"name": "",
"is_accepted": false
}
] |
|
75a1b9ff683a7a90b5734cdeb72313b2 | [vector b cross vector c ,vector c cross vector a, vector a cross vector b] is equal to : | askiitians.com | 2021.31 | [
{
"text": "[vector a, vector b, vector c]square",
"name": "",
"is_accepted": false
}
] |
|
bc92bbe70b602e543caaeaafc959c2b5 | define vibration. | askiitians.com | 2021.21 | [
{
"text": "vibration is the to and fro or back and forth motion of an object.",
"name": "",
"is_accepted": false
}
] |
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