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5144644b6c622278f06a2f5b0ac1caef | one of the paternal twins may be a girl and the other may be a boy. why ? | askiitians.com | 2021.21 | [
{
"text": "paternal twins are not of the same sex. they are a result of double fertilisation — fertilisation of two ova from two sperms.",
"name": "",
"is_accepted": false
}
] |
|
2d5b9913bd1794d76498d84e0485edab | a plane flying horizontally at aheight of1500m with avelocity of 200m/s passes directly overhead an antiaircraft gun.then the angle with the horizontal at which the gun should be fired for the shell with a muzzle velocity of 400m/s to hit the plane is? | askiitians.com | 2021.31 | [
{
"text": "for y direcn. 1500 = 400sinthetha*t – 0.5gt^2................(1) in x direcn. x =400sinthetha*t.......................(2) for plane, x = 200*t...............(3) i think only with solving eqns. (2) and (3) u would get the answer. t should be same in order to hit the bullet.",
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}
] |
|
d41501a84bdff0521e3a4329da5c1394 | how does your body solve the problem of altitude sickness, when you ascent tall mountains? | askiitians.com | 2021.25 | [
{
"text": "the body compensates low oxygen availability by increasing red blood cell production and increasing the rate of breathing.",
"name": "",
"is_accepted": false
}
] |
|
41cf37385b8843d948ae1163af05ef64 | hey,, i got 2336 rank in obc category.. could der some scope of getting sumthing in iit, ism or bhu..?? | askiitians.com | 2021.31 | [
{
"text": "dear anirudh, you may get seat in ismu-dhanbad with m.sc integrated branches. please go through this link you can see last year statistics http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx 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. 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. regards vijay luxmi",
"name": "",
"is_accepted": false
},
{
"text": "dear anirudh, you may get seat in ismu-dhanbad with m.sc integrated branches. please go through this link you can see last year statistics http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx 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. 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. regards vijay luxmi",
"name": "",
"is_accepted": false
}
] |
|
bd7a128746d5e4415d953f79b4f432c8 | i am with an institute which is a little new and i dont have much competition here can you help me predict my probable rank in jee ? | askiitians.com | 2021.25 | [
{
"text": "dear pratik, before appearing for exam no one can tell ur expected rank.. as of now concentrate on ur studies and try to give your 100% it is your knowledge that is to be tested and not the institute from where you are study9ng. 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
}
] |
|
86f3aa717056c44c9dbf97ebf70244ce | please solve question 8 with full solution very important | askiitians.com | 2021.43 | [
{
"text": "",
"name": "",
"is_accepted": false
},
{
"text": "let f(x)= (a-b)x^2+(b-c)x+(c-a) clearly, f(1)= a-b+b-c+c-a so f(1)= 0 hence 1 is a root of the eq. f(x)= 0 since both roots are equal, they must be 1 and 1. now, we apply the sum of roots formula (vietas formula): 1+1= -(b-c)/(a-b) or 2a-2b= c-b hence 2a= b+c kindly approve :))",
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] |
|
6ead5fbea08dbd22092f520652f20533 | sir i have filled wrong question medium instead of english ihave filled hindi what should i do nw? | askiitians.com | 2021.43 | [
{
"text": "mark a mail to official website of iit jee..!!",
"name": "",
"is_accepted": false
}
] |
|
01343b10fbe527b3a7a7f9f75efb2ed6 | what is the closing rank of iit kgp ee this yr?? | askiitians.com | 2021.25 | [
{
"text": "its 1001 for the gen category",
"name": "",
"is_accepted": false
}
] |
|
7049b320a1a910bef2bd686a6ad696f0 | let the equation of aline be x +y+2. if the co ordinates of orthocenter and circum center are(1,1) and (2,0)then the radius of circumcircle is | askiitians.com | 2021.43 | [
{
"text": "i fjust this much information is given, assuming the question to be complete, proceed with calculating the coordinates of length and foot of perpendicular from both the points on the line.as the circumcenter would meet the line at the point of bisection of the side contained in the line whose eqn is given, find the eqn of circumcircle and the line passing through the orthocenter and perpendicular to the line. this is the eqn of the altitude on which the vertex would lie. also, the circumcircle whose eqn has been formed will also pass through the vertices. so, the point of intersection would give the coordinates of the vertex opposite ti the side which is contained in the line whose eqn is given. for finding the radius of circumcircle, you will need either a vertex or a side more. so, i guess the question is incomplete. so, all the best.",
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}
] |
|
165535e571928064657bef5d1ece0818 | in carbonic acid there is a hydrogen bonded molecule then why it is not an organic compound | askiitians.com | 2021.43 | [
{
"text": "carbonic acid is the name of compound having chemical formula h2co3.this acid is formed when carbon dioxide dissolves in water.co2 is also not an organic compound.organic compounds are those compounds which have carbon-carbon and carbon-hydrogen bonds.but in carbonic acid there is neither carbon-carbon bond and nor carbon bonded to hydrogen.in fact in this compound carbon is bonded to oxygen atoms.the structure suggest that it is an in inorganic compound and not the organic one.the hydrogen atoms present in the compound are bonded to oxygen atoms and not with the carbon atom.",
"name": "",
"is_accepted": false
}
] |
|
2f649f0b97c79cda0e704ba831c596e4 | pcl5 | askiitians.com | 2021.43 | [
{
"text": "trigonal bipyramidal",
"name": "",
"is_accepted": false
},
{
"text": "the structure of pcl5 is trigonal bipiramidal.",
"name": "",
"is_accepted": false
}
] |
|
6066f52864294188951ff78ef319e806 | hermitian matrix | askiitians.com | 2021.39 | [
{
"text": "dear akram, in mathematics, an hermitian matrix (or self-adjoint matrix ) is a square matrix with complex entries that is equal to its own conjugate transpose – that is, the element in the i -th row and j -th column is equal to the complex conjugate of the element in the j -th row and i -th column, for all indices i and j : if the conjugate transpose of a matrix a is denoted by , then the hermitian property can be written concisely as hermitian matrices can be understood as the complex extension of real symmetric matrices. hermitian matrices are named after charles hermite, who demonstrated in 1855 that matrices of this form share a property with real symmetric matrices of having eigenvalues always real. 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": "",
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}
] |
|
492480058b946cb883ee2cfaddf58b7e | sir, please advise the better option a preparatory course at indian school of mines university or nit tiruchirapally-production engineering | askiitians.com | 2021.31 | [
{
"text": "i tkink nit trichi would be better option for u, as it would provide u better environment for learning. nit trichi is cosidered as one best nit of the country. there u wud get in touch with people with more caliber which could b opportunity for u to learn from them. u wud more aware of the future option & wud b more informative abt the present scenario of ur feild. as per my knowledge, pdtn engg. hav better job opportunity &more over working conditions r better than conditions in mines.",
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}
] |
|
b19111d6b7fcfdc7cfd0d57ea5243683 | this is a probability question. suppose we start our journey from step number 0. we now toss a coin. if the result is a head, we add 3 to a counter. if the result is a tail, we add 2 to the counter. we now move to step number 1. we toss the coin again and depending on the result, we update the counter. we then move on to step number 2 and repeat the experiment and so on. the question is, when we arrive at step 10, what is the probability that the counter reads 23? | askiitians.com | 2021.21 | [
{
"text": "there are total of 11 steps from 0 to 10 so if lets suppose at every counter there was tails and hence the counter increments by 2 at every step and hence the total would be 22. it is an obvious reasoning from here that to get 23 as the counter value there must be an heads toss at only one out of total 11 steps. so the probablity of having 10 tails and 1 head sequenceis",
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] |
|
7d6db1f9bfb5ed2ec1f585811baf32f6 | compare the above system with the probableosystemso in hilly/mountainous areasoor plains or plateau regions. | askiitians.com | 2021.43 | [
{
"text": "dear student water harvesting system in hilly and mountainous areas is different from plains and from plateau region. for e.g., in hilly areas like himachal pradesh a local system of irriggtion was developed called kulhs. the water flowing in the streams was diverted in,manrjnaale channels which took this water to numerous villages down the hillside. whereas water in plains is collected in check dams or tanks, tals or bundhis. thanks",
"name": "",
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}
] |
|
1c025a19641cc0278dd833b206f8d734 | a ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle o to the horizontal. the angle o for which the reflected ray becomes vertical is (a) 40°. (b)50°. (c)80°. (d) 100° | askiitians.com | 2021.39 | [
{
"text": "draw a ray-diagram, angle between the reflected and incident ray = 80 (final ray is vertical and incidence is 10 wrt horizontal) angle of incidence = angle of reflected ray = 40 angle of reflected ray with mirror = 90 – 40 = 50 so, angle with horizontal = 90 – 50 = 40",
"name": "",
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},
{
"text": "a ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle o to the horizontal. the angle o for which the reflected ray becomes vertical is",
"name": "",
"is_accepted": false
},
{
"text": "dear student, please find the attached solution to your question. angle between the reflected and incident ray = 80 (final ray is vertical and incidence is 10 wrt horizontal) angle of incidence(i) = angle of reflection(r) = 40 angle of reflected ray made with mirror = 90 – 40 = 50 so, angle with horizontal = 90 – 50 = 40 0 hope it helps. thanks and regards, kushagra",
"name": "",
"is_accepted": false
}
] |
|
5cee229a7c740938330e50faf32431c0 | if at the moment t=0, the separation between the cars is 90m and the length of each car is 5m, the moment of time at which they completely cross each other is t= | askiitians.com | 2021.31 | [
{
"text": "dear student your question is incomplete. please check and repost it. you can also attach an image. i will be happy to help you. regards arun (askiitians forum expert)",
"name": "",
"is_accepted": false
},
{
"text": "v p = 10m/sec v q = 15m/sec s = 90m length = 5m relative speed = 10+15= 25m/sec distance = 2×length+s = 2×5+90= 100m time = distance/relative speed = 100/25 = 4sec",
"name": "",
"is_accepted": false
}
] |
|
c00541dfa204912034c96a1323b9b5e8 | plz brief me about general theory of solvent system: | askiitians.com | 2021.25 | [
{
"text": "general theory of solvent system: in an attempt to have more general definition of acids and bases applicable to protonic and non protonic solvents, several definitions havebeen proposes. one given by cady and elsey (1938), according to which an acid is a solute that, either by direct dissociation or by reaction with the solvent gives the anion characteristics of the solvent and a base is a solute thateither by direct association or by reaction with the solvent gives the cation characteristics of the solvent. utility of the concept: evidently this concept of solvent system can be used to explain the acid-base reactions occuring in aqueous solvents (protonic and non-protonic both). limitations: * this theory doesnot consider a number of acid base reactions included in the protonic definition. * it limits acid-base phenomena to solvent systems only. * it cannot explain the neutralization reactions occuring without the presence of ions. thus, the theory can simply be said to be an extention of the arrhenius water ion system.",
"name": "",
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}
] |
|
029c9db7a37876cde8fbcff2e1e09d32 | please suggest me some books and tips to crack rmo.i am in class 9 presently | askiitians.com | 2021.39 | [
{
"text": "to crack rmo you can consult rd sharma maths, and your ncert problems. sher mohammad faculty askiitians b.tech, iit delhi",
"name": "",
"is_accepted": false
}
] |
|
8957e9eee340b57a2f926881e25a7624 | 51. geothermal energy is widely trapped in usa and \_\_\_\_\_\_\_\_\_\_\_\_\_\_ . | askiitians.com | 2021.31 | [
{
"text": "answer: explanation: new zealand",
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"is_accepted": false
}
] |
|
0c000d0654c561130663ca00769673f8 | sir which book you recommend to start preparing organic chemistry for iit and cbse | askiitians.com | 2021.25 | [
{
"text": "dear sagar, you can take help of the link below, http://www.askiitians.com/important-books-iit-jee.aspx 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
},
{
"text": "dear sagar verma, i would suggest you the foliowing books for iitjee chemistry.......... s.no authors /publisher name of books remarks 1 p.bahadur(g.r.bathla & sons) numerical chemistry physical chemistry 2 o.p. tandon physical chemistry physical chemistry 3 o.p. tandon inorganic chemistry inorganic chemistry 4 o.p. tandon organic chemistry base book 5 paula bruice yurkanis organic chemistry reference book 6 j.d. lee inorganic chemistry reference book 7 bruce h. mahan university chemistry reference book 6 organic chemistry by morrison & boyd organic chemistry reference book good luck!!!!!!!! plz. approve my answer, if you loved it, by clicking 'yes' given below!!!!!!!! plz. plz.!!!!!!!! don't forget!!!!!!!!!",
"name": "",
"is_accepted": false
},
{
"text": "dear student, go for arihant or jagdamba best of luck..!!!! we are all iitians and here to help you in your iit jee preparation. 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 : click here to download the toolbar.. askiitians expert sagar singh - iit delhi",
"name": "",
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}
] |
|
1c983fb35e27948819d91eefcc52d72f | a car with a speed of 10 m/s is in the direction of r vector =-4 i cap +3j cap . the velocity of the car is | askiitians.com | 2021.31 | [
{
"text": "v = | v | v^ v = 10 r^ v = 10 ( r / | r | ) v= 10 (-4i^+3j^/✓(((-4)^(2))+((3)^(2))) ) v= 10 (-4i^+3j^/ 5) v= 2(-4i^+3j^) v= -8i^ + 6j^ regards arun (askiitians forum expert)",
"name": "",
"is_accepted": false
}
] |
|
daec9dab23316fb01ceca8664dbb7d00 | i am interested in inventing programmed machines.....i am in class 11...and want to study in iit....i like programming very much and want to implement it in inventing programmed machines.......which branch should i take in the iit..... | askiitians.com | 2021.31 | [
{
"text": "dear ayan as per your interest you can choose electronics or computer science branch. 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 & aieee preparation. all the best. regards, askiitians experts badiuddin",
"name": "",
"is_accepted": false
}
] |
|
500cece379aa44a2a4e9c945fbd769f1 | maximum and minimum value of sin^2(60-x)+sin^2(60+x) | askiitians.com | 2021.43 | [
{
"text": "",
"name": "",
"is_accepted": false
},
{
"text": "dear student, = = so hence minimum value = 0.5 = 1/2 maximum value = 1.5 = 3/2 hope it helps! for any further queries, don’t forget to ask!",
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"is_accepted": false
}
] |
|
65c97d809e55d83f6508e9e34d72387a | two identical particles a and b are attached to a string of length 2l a to middle and b to one of the ends. the string is whirled in a horizontal circle , with the end o fixed . if the kinetic energy of b relative to a is e , then the absolute kinetic energies of a and b are e and 2e e and 4 e e and 3e e and 5e | askiitians.com | 2021.31 | [
{
"text": "since a and b are rotating with the same angular velocity, the kinetic energies are va = wl and vb = 2wl e = ½ m (vb2 – va2) = e hence ea =e and eb = 4e hence option 2 is correct.",
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"is_accepted": false
}
] |
|
47f076a0f757a8e11321af58e2db9885 | where will be the maximum charge density in a cylindrical body? | askiitians.com | 2021.39 | [
{
"text": "in the middle of the cylinder body",
"name": "",
"is_accepted": false
},
{
"text": "the maximum charge density in a cylindrical body will be at centre of axle of cylinder. sher mohammad askiitians faculty b.tech, iit delhi",
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|
e316b4a7843b0847975ccf597eb218ee | i have secured 80 marks in jee mains(gen category).can i get admission in any of the nits.is there any chance?? | askiitians.com | 2021.21 | [
{
"text": "no chanceeeeeeeeeeeee",
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"is_accepted": false
}
] |
|
0b2d644bf73c9ef29179c8fc0cc8032a | 1/(3x +5x^-n) as integration sir please solve it fast | askiitians.com | 2021.25 | [
{
"text": "1/(3x +5x^-n) = x^n/(3x^(n+1)+5) now let y=(3x^(n+1)+5) so dy/dx=3(n+1)x^n so integral is dy/3y(n+1) =lny/3(n+1) = ln(3x^(n+1)+5)/3(n+1) + c",
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}
] |
|
c887ee70e7fd3f252974a9e6dda6957a | where do the new iits stand as compared to the old???? is it completely alright to get admission in the new iits on the point of view of faculty, campus facilities etc..... | askiitians.com | 2021.25 | [
{
"text": "dear puneet, the new iits are just established and are not stablised. they are mentored with the older iits but are not provided by all the facilities that a student of that iit gets. like iit delhi is mentoring iit punjab but they are having separate class, separate labs and even the faculties are also different.the latter students are not allowed to participate in various personality development programme held by the mentoring iits. they also have lodging and fooding problem as they are just somehow managed to get stayed at older iits. they lack a lot of things like proper administration, management etc its better to take admission with good branch at it-bhu rather than goin for new iits but in case you are not getting any core branch at it-bhu( due to poor rank ) like comp. elec. mech. civil and chemical than it would be safe to opt for branches at new iits as they have started only with the core branches and thougfh it will take time iits will get to maintain their standard. thank you.",
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}
] |
|
e188023c8d008a34c3a5f8e9fcd4806f | of and f2 can be compaerd in terms of | askiitians.com | 2021.21 | [
{
"text": "electronegative difference. electronegative difference between in f2 is zero but in of it is 0.5. we can say f2 is covalent molecule & of is ionic molecule.",
"name": "",
"is_accepted": false
}
] |
|
864972833f19cb5468e180c32b554ce2 | a stone is launched upward at 45 degrees with speed v 0 .a bee follows the trajectory of the stone at a constant speed equal to the initial speed of the stone . a)find the radius of curvature at the top point of the trajectory. b)what is the acceleration of the bee at the top point of the trajectory?for the stone ,neglect the ir resistance | askiitians.com | 2021.43 | [
{
"text": "dear student, the path of the stone is going to be a parabolic path. the maximum height reached by the stone would be given by: a) since the bee is following the path of the stone, so the path traversed by the stone would be parabolic as well and hence the radius of curvature would be given by: b) the centripetal acceleration of the bee would be given by: regards sumit",
"name": "",
"is_accepted": false
},
{
"text": "centripetal acceleration = v^2/ra) velocity at top most point of the particle = u sin(45°) = u/√2acceleration perpendicular to velocity of particle is `g` which is equal to centripetal acceleration at that moment for the particle`s journey. let r be the the radius of curvature.=> g=((u/√2)^2)/r=> r=(u^2)/2gb) for bee the radius of curvature of the path will be same i.e. r=(u^2)/2gwe know that the speed of the bee is u at the highest point also. let the centripetal acceleration at the highest point of the trajectory for bee be `a`.=> a=(u^2)/((u^2)/2g)=> a=2g",
"name": "",
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|
af84a207665a2d30c38c2db475a600dc | fill in the blanks. (e) \_\_\_\_ – 15 = – 10 iaemfuewgnuersiojmhnbiorjhmneru | askiitians.com | 2021.25 | [
{
"text": "dear student (e) 5 – 15 = -10 thanks",
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"is_accepted": false
}
] |
|
feb853b59cad243115eda6c6e74200ed | find the minimum value of f(x)=x^2-x+1÷x^2+x+1 | askiitians.com | 2021.21 | [
{
"text": "f'(x)=0 imply (2x-1)( x^2+x+1 ) - (2x+1)( x^2-x+1 )=0 solving gives, x=1",
"name": "",
"is_accepted": false
},
{
"text": "y=(x^2-x+1)/(x^2+x+1)\nyx^2+yx+y=x^2-x+1\n(y-1)x^2+(y+1)x+y-1=0\nsince x belong to r\ntherefore, discriminant>=0\n(y+1)^2-4(y-1)(y-1)>=0\ny^2+2y+1-4y^2+8y-4>=0\n-3y^2+10y-3>=0\n3y^2-10y+3<=0\n(y-3)(3y-1)<=0\ny belong to 1/3 to 3 so minimum value is 1/3",
"name": "",
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}
] |
|
dd5a984df05eec320dc04c94ed195537 | in which cell glucose is not converted into co2 anerobically? | askiitians.com | 2021.25 | [
{
"text": "its rbc's becoz there no rlnship of conversion of glucose to co2 aerobically....remember mitochondria thing",
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"is_accepted": false
}
] |
|
db0793d26dfa8216645823ea0679584f | major topics | askiitians.com | 2021.39 | [
{
"text": "physics : electricity and magnetism,optics,waves theory,mechanics is very important specially rotational mechanics",
"name": "",
"is_accepted": false
}
] |
|
3a2e20aea39db392c466d31ed9ac4319 | i am expecting my rank round about 200 in iit jee 2010, what branch should i opt, mechanical or electrical, if i am to choose? | askiitians.com | 2021.25 | [
{
"text": "dear gurbir, as your score is of 210 marks in iit jee 2010, so with these marks your estimated rank would be some where in between 5500 to 6000. according to the calculation chances are less that you can get mechanical engineering branch in any of the iit's . now fortunately if u succeed to get mechanical engineering then that would be better than electrical engineering. and as compared to the last year's cutoff this year this has been predited that the cutoffs will be lowered, as the level of the paper is slightly decresed. however score may vary and as a result rank may also vary, a slight difference may create lots of difference in rank. for further details you can visit the following: http://www.askiitians.com/iit-jee-2010-cut-offs.aspx http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx askiitians.com provides online iit jee courses and iit jee test series with iitians. click here to get free online test series and check your status timely or you can join us as our registered user for getting best iit jee study material or iit jee test series. askiitians provide you all the best possible information, feel free to ask. all the best. thanks and regards. akhilesh shukla",
"name": "",
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},
{
"text": "dear gurbir, first of all congratulations if you are expecting your rank around 200, . so according to me i will advice you to opt for mechanical engineering because this has vast scope in all feilds. and further this branch will provide you better feasibility for your growth of future. for further detals you can visit the following link: http//:www.askiitians.com askiitians.com provides online iit jee courses and iit jee test series with iitians. click here to get free online test series and check your status timely or you can join us as our registered user for getting best iit jee study material or iit jee test series. askiitians provide you all the best possible information, feel free to ask. all the best. thanks and regards. akhilesh shukla",
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0aede35196bcaf0e9482d0c9d5f2c4ea | hello , i want to ask why softness of alkali metals increases from lithium to cesium . thank you . | askiitians.com | 2021.39 | [
{
"text": "there being only a single electron per atom in alkali metals, the metallic bonding is not so strong. as the result, the metals are soft in nature. however, the softness increases with increase in atomic number due to continuous decrease in metallic bond strength on account of an increase in atomic size.",
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6de554fa14108e643bdbcb10f9b23507 | at the cornors of a lamina charge density is found to be higherwhy? | askiitians.com | 2021.39 | [
{
"text": "dear ankit, the principal features of the structure of a non-separating laminar boundary layer near a sharp corner, deflecting the exterior inviscid flow through a small angle α * , depends on the solution of the conventional boundary-layer equations but with novel boundary conditions. further these conditions take on one of two forms depending only on whether the exterior flow is supersonic or subsonic and the effects of the boundary layer upstream of the corner and of the wall temperature are purely scaling. we are all iitians and here to help you in your iit jee preparation. all the best. if you like this answer please approve it.... win exciting gifts by answering the questions on discussion forum sagar singh b.tech iit delhi [email protected]",
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] |
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7663fbd9b84b11bb577108a7a81e989b | suppose you want to dry your school uniform quickly.would spreading it near an angithi or heater help?if yes, how | askiitians.com | 2021.39 | [
{
"text": "iron it..",
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] |
|
ad5859bfd29ac32246569a913f136cbc | hi, this is raajit from chennai. i am finding it tough to decide among the two,ie, ism and nit trichy. which one shud be preferred? | askiitians.com | 2021.21 | [
{
"text": "dear raajit, eee in nit trichy is is better than eee in ism dhanbed as nit trichy is the top nit and better than ism. best of luck!!!",
"name": "",
"is_accepted": false
},
{
"text": "i seriously think that u should join ism-dhanbad as it is much better than any of nit's. in ism, u will get better research environment greatly funded by govt. of india & various mnc's . u will also get higher pay packages there. for instance, highest package in ism is in petroleum with a student fetching whopping 45 lakh per annum, u can not expect any such offer in nits.",
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] |
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d33b79dfca0f56ad0c44a628a25c02fa | which is the largest and longest phase in mitosis ....???plzz justify | askiitians.com | 2021.43 | [
{
"text": "prophase is the longest phase of mitosis, but it occurs faster than interphase . anaphase is the shortest phase of mitosis. regards arun (askiitians forum expert)",
"name": "",
"is_accepted": false
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{
"text": "prophase is the longest phase. prophase is the first stage of cell division in both mitosis and meiosis. beginning after interphase, dna has already been replicated when the cell enters prophase. the main occurrences in prophase are the condensation of the chromatin and the disappearance of the nucleolus.",
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] |
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2ac1cfd433a1f1b470447e950665219a | do all the stars in the sky move? explain. do all the stars in the sky move? explain. | askiitians.com | 2021.25 | [
{
"text": "dear student no, all the stars do not move in the sky. they appears to move from east to west. it is due to the rotation of earth on which we live. the earth moves from west to east. but pole star does not appear to move. thanks",
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] |
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ded30c83ba152ec6e1cf70907ab04707 | minimum energy required to take out the only one electronj from ground stste of he2+ | askiitians.com | 2021.31 | [
{
"text": "dear siddhant he + ion is a single electron species which resembles like hydrogen. therefore, the energies of the stationary states of hydrogen-like ions are given by the expression en =( - 2.18 × 10 -18 ) z 2 / n 2 atom -1 here n = 1and , z = 2 en = (-2.18 x 10 -18 ) 2 2 /1 2 = 8.72 x 10 -18 j",
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32e37d43fa181329bf6a48807af2343d | sir, i'm getting 132 in advance obc-ncl. can i get iit?? | askiitians.com | 2021.39 | [
{
"text": "hi shubham, sorry to say seeing previous year's status you probably won't get any iits. thanks & regards arun kumar iit delhi askiitians faculty",
"name": "",
"is_accepted": false
}
] |
|
0172bb80b2a493b36c91c735f5f68908 | einstein and the laser | askiitians.com | 2021.31 | [
{
"text": "in 1917 einstein, in the process of providing an especially simple and direct proof of planck’s radiation equation introduce into physics a new concept- that of stimulated emission. as it happens this process is basic to laser operation. even though the first operating laser did not appear until 1960, the groundwork for its invention was put in place by einstein’s work. the importance of stimulated emission is indicated by the fact that the very word “laser” is an acronym for “light amplification by the stimulated emission of radiation.” it is interesting that, in 1905, einstein first advanced the concept of the photon and realized that it could provide an explanation for the photoelectric effect. we learn from both of these examples that practical devices of major importance can flow from the study of problems that seem to have no relevance to technology. when next you see a photoelectric elevator door opener or listen to a cd player, think of einstein. now let us examine three processes that involve the interaction between matter and radiation.",
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] |
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7025c6373305de84afd7da63dbf88fd9 | please answer the attached question. please...... ..... ..... .... .... . | askiitians.com | 2021.21 | [
{
"text": "at some places, a narrow band of parenchyma is formed by the cambium. this band of parenchyma passes through the secondary xylem and secondary phloem in radial directions. these are called secondary medullary rays. hence option a is correct",
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] |
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ffcb72c408c83c751b128e0b582abb81 | are there questions , chapterwise ? | askiitians.com | 2021.21 | [
{
"text": "please clearly state the question.",
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},
{
"text": "ques not clar, man!",
"name": "",
"is_accepted": false
},
{
"text": "question please ?",
"name": "",
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] |
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08a20061b8ec6e7c9daf54667b2b30e9 | i had exam day after tomorrow. plz solve the whole exercise 2 for me . all the questions from 1 to 9 . questions are in the attachment. | askiitians.com | 2021.25 | [
{
"text": "solving one by one first no 1.sol:unit vector of vector 6i+2j+3k is 6i+2j+3k/7 and to 3i-2j is 3i-2j/(13)^/12",
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{
"text": "2:cos of angle between vector a and b is a.b/|a||b| here let a be 2i-2j+4k and b be 3i+j+2k .solve to get a.b (6-2+8)=12 |a||b|=4(21)^1/2 now cos = (3/7)^1/2 now sin is (1-cos^2)^1/2 solve to get sin =(4/7)^1/2",
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{
"text": "3:a×(b×c)=(a.c)b-(a.b)c this is a simple formula and we have also express it as combination of a, b and c.",
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] |
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758f1c330da8a40d9574cf22981b1453 | two bar magnet are placed close to each other with their opposite poles facing each other. in the absence of other forces the magnets are pulled towards each other and their kinetic energy increases. does it contradict our knowledge that magnetic force cannot do any work | askiitians.com | 2021.39 | [
{
"text": "to take this two magnets in a situation that they can attract each other, external agent has to do work. this work is stored in the form of potential energy by virtue of which the above case happened.",
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f1d0ddacc6ca7fff8d58739a2a99bbe2 | can some one give me illustrative exaple on trigonometrical ratios of associate angle? | askiitians.com | 2021.21 | [
{
"text": "hello student, well if we consider angle a then associated side is a similarly if we consider angle bthen associated side is b area of a triangle so this is how associated angle works. thanks & regards arun kumar btech, iit delhi askiitians faculty",
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d00cdb8d5e7c25b7de843320639341b5 | the slopes of isothermal and adiabetic curves are related as | askiitians.com | 2021.25 | [
{
"text": "hi sofi, this is your required relation …............................................ if want its derivation you can ask :)",
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] |
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1da54c2ec2f0fa9d1387074700b138d7 | my rank in iit jee 2010 is 9244will i get any iit,rgipt or iiser? | askiitians.com | 2021.39 | [
{
"text": "iit wont be a good option at this rank as you wont be getting a branch of your choice in case you are interested in b.tech. better go nit if you have got decent rank in aieee.",
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] |
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92f903c83ad75cd14e35af041309967b | i belong to delhi region. i have got 38332 all india rank and 3430 state rank. do u think i can get admission in dce or nsit for ece or mechanical engg. | askiitians.com | 2021.31 | [
{
"text": "chances to get civil .ece,mech may be little difficult to get do u approve my answer?",
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2ee0b2268ff2a59b0f81f3340efca465 | once a body starts moving on table, the friction which comes into play is (a) static friction (b) sliding friction (c) limiting friction (d) none of these | askiitians.com | 2021.21 | [
{
"text": "(b)",
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51e47ade62d97aaff3d3d21cbd1444bc | dear sir i got the following rank . so please help me know which college i will get seat. all india enginearing architecture overall 110,450 8,646 category 79,343 4,116 orissa state overall 2,221 52 category 1,622 38 with regards somnath kejriwal | askiitians.com | 2021.31 | [
{
"text": "hi , plz check out these link for the opening and closing rank of the previous year in aieee colleges for architecture, click on link given below : www.askiitians.com/aieee-counselling/architecture-counselling.aspx for engineering, click on link given below : www.askiitians.com/aieee-counselling/aieee-engineering-counsellings.aspx thanks and all the best !!!!!!!!!!",
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37967b73506534ccaef39fb8cbb2e40f | i got 2890 in advanced 2015. how is mems at iit-b? i mean, how are the placements? i basically want to do ms from a good foreign univ. does mems have a good chance of acceptance at a foreing univ? what might be the other better alternatives? i may get a core branch at bits pilani. please help me to make a decision!! | askiitians.com | 2021.31 | [
{
"text": "its in iitb, no second thought of it, the tag itself decides your fate.please prefer iitb to bits",
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0c86ce62b545fc4d0afaec6d6c342340 | a sample of metal chloride weighing 0.22 g required 0.51 g of agno3 to precipitate the chloride completely. tha specific heat of the metal is 0.057. find the molecular formulaof the chloride if the metal is m. | askiitians.com | 2021.39 | [
{
"text": "mclx + agno3 -----agcl + mno3 mass of 1 mole of metal is given by dulong petite law at wt*sp heat=25 at wt=25/.057=438.6g/mole now mole of agno3=.51/169.87=.003 mole of mclx=.22/438.6+35.5x both are equal solve and get the answer",
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] |
|
c2a5f19ba686f1ed832d94b7eeb95ba5 | which is greater molality or molarity?why? | askiitians.com | 2021.25 | [
{
"text": "its not about which is greater.it is simply a method of expressing concentration of a solution. molarity is the no of mole of solute in a given volume of solution. molality is moles of solute in a given (per kg) of solvent. thanks and regards sunil kr askiitian faculty",
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{
"text": "suppose for ex 1m kcl 74.5 volume=1lt mass of kcl in 1lt=74.5 gm mass of water in 1 lt of otal volume solution=1000g-74.5gm=.925gm=.925 kg mass of solvent=.925 kg molality=1/.925 =1.08 thus in molality wt of the solvent is less than than total volume of the solution in which both are in denominator.because wt of the solute has to be subtracted to get the molality. thanks and regards sunil kr askiitian faculty",
"name": "",
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},
{
"text": "molarity",
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{
"text": "molality. molarity is moles solute / litres of solution molality is moles solute / kg solvent for molality, you find the mass of solution, then subtract the mass of solute to get the mass of h2o so you use a slightly lower figure for kg of water then you would litres of solution. thus molality will always be slightly higher. eg 1.00 m nacl moles nacl = 1.00 moles volume solution = 1.00 l molarity = 1.00 m mass nacl in 1l 1.00 m solution = molar mass x moles = 58.44 g/mol x 1.0 moles= 58.44 g mass h2o (assuming density = 1 g/ml) = 1000 g - 58.44 g = 941.56 g = 0.94156 kg molality = 1.00 mol / 0.94156 kg = 1.06 m the more dilute the solutution, the lower the mass of solute and the more similar kg solvent will be to litres solution, thus the more dilute the solution the closer molality and molarity will be.",
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d29188cc094e33041a78edf9b0a12f86 | hello!! i had missed my classes of emi at our coaching..i tried a lot to cope up further and infact succeeded to an extent yet i am not confident in solving its ques.. i need your help so that i can take a grip on the topic... how can i proceed?? please suggest.. thank you.. | askiitians.com | 2021.31 | [
{
"text": "dear student, you can start the topic from any good book and wherever you face any difficulty you can tell us by posting 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]",
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b2720e7f4ec7ae8a498cf685c92106a3 | i am interested in robotics technology but a little confused as to which stream should i opt at an iit for, to pursue my ambition. does it fall undr electrical engineering or computer science engineering? | askiitians.com | 2021.39 | [
{
"text": "you can tech mechanical or electrical , as both of these branches inclued robotics as their core subject.",
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] |
|
3268094131a6eef95676241631a1924b | find the set of values of k, for which the equation x2+2(k-1)x+k+5=0 possess atleast one positive root. | askiitians.com | 2021.21 | [
{
"text": "ans:- (-infinity to 1)",
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},
{
"text": "thanx for the help sir.... sir please do a small favour for me.... please show me the solution of this question...plz tell me how to solve this ques......",
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] |
|
f248349744412ca6b86844acbace5075 | i'm getting 255 marks in aieee 2009 . can you predict my rank? | askiitians.com | 2021.31 | [
{
"text": "hi meraj .. your rank will be 5000- 10000 !!! all d best for your future!!!",
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}
] |
|
378e2986c434f113fe6b9278e5406c58 | lpg is a better domestic fuel than wood. lpg is a better domestic fuel than wood. | askiitians.com | 2021.43 | [
{
"text": "dear student lpg has more calorific value and produces no pollution. so it is better domestic fuel than wood. thanks",
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}
] |
|
ac7ff1c2f21799e6783893bd57f733fe | what is use of natural wair in a.c. power supply . when natural has no voltage when we touch live and natural wair why sort these | askiitians.com | 2021.31 | [
{
"text": "@ ajay the neutral is the return path for current in single wire districution system and connected to the ground , this is called as single wire earth return . the neutral allow unused current to return to the feeder transformer generally located at the substation for redistribution of unused current , if the neutral didnot exist the distribution system would not be complted . hope it clears ..",
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04c2342a23fc1aa61563c06eab3b6ed3 | kindly show me the solution for the given sum. it is taken from the january session of the jee main examinations. | askiitians.com | 2021.43 | [
{
"text": "this is a rather easy problem. we simply need to apply the property: ∫a to b g(x)dx = ∫a to b g(a+b – x)dx now, let j= (1/(a+b)) * ∫a to b x(f(x) + f(x+1))dx.......(1) so j= (1/(a+b)) * ∫a to b (a+b – x)(f(a+b – x) + f(a+b – x+1))dx........(2) now, since f(a+b+1 – x)= f(x) for all x, replace x by x+1 to get f(a+b – x)= f(x+1) so, (2) becomes j= (1/(a+b)) * ∫a to b (a+b – x)(f(x+1) + f(x))dx......(3) add (1) and (3) 2j= (1/(a+b)) * ∫a to b (a+b)(f(x+1) + f(x))dx or 2j= ∫a to b (f(x+1) + f(x))dx or 2j= ∫a to b f(x)dx + ∫a to b f(x+1)dx now, ∫a to b f(x+1)dx= ∫a to b f(a+b – x+1)dx= ∫a to b f(x)dx so, 2j= ∫a to b f(x)dx + ∫a to b f(x)dx or j= ∫a to b f(x)dx let x= y+1 then j= ∫a – 1 to b – 1 f(y+1)dy since y is a dummy variable, replace it back by x. so j= ∫a – 1 to b – 1 f(x+1)dx option (3) kindly approve :))",
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] |
|
c20254c7b3dde89457f991c374392922 | does wave travels in a vaccum yes or no why??? give reasons?? | askiitians.com | 2021.39 | [
{
"text": "electromagnetic waves travels in vacumm. mechanical waves requires medium to propagate",
"name": "",
"is_accepted": false
},
{
"text": "it depends on what waves you are talking about . electro magnetic waves travel in vaccum too . whereas mechanical waves do require material medium",
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|
9b695b153a822b7da02182e3da5316a2 | how do we find the breakdown voltage of capacitors connected in series, if their individual breakdown voltages are known?? | askiitians.com | 2021.21 | [
{
"text": "breakdown voltage is the voltage at which the insulating dielectric material between the capacitor plates breaks down and conducts electricity. in series: breakdown voltage = 2 * vb (but only if the capacitances are equal!) in parallel: breakdown voltage = vb ...where vb is the breakdown voltage of the capacitor, and assuming vb is the same for both capacitors.",
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] |
|
e73ef8c76d40732a74f559b2033d2ddf | in how many points do the graphs of the equations x2 + y2 = 25 and y2 = 4x intersect ? | askiitians.com | 2021.39 | [
{
"text": "hi, solving these two equations, we get two values of x, one negative and one positive. putting the positive value of x in the equation of parabola,we get two values of y. so, there are two points on which these two curves intersect. thanks.",
"name": "",
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{
"text": "hi student substitue y 2 = 4x in equation of circle x 2 + 4x – 25 =0 x= ( -4 ± ( 16 + 100) ½ )/2 = -2 ± ( 29) 1/2 since y cannot be negative so x will only take positive value i.e -2 + (29) ½ for that 2 values of y are possible hence 2 points",
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] |
|
208f4bd8d155806789d1a41ac58e7ffc | hi, m gettin 190 in aieee 2010. what will b my state rank for gujarat and jaipur? and which colleges do i stand a chance in? i hv also filled up jaypee mair and da-iict. do i hv a chance of getttin thru dese? pl reply asap | askiitians.com | 2021.43 | [
{
"text": "dear vijay , your estimated rank will be around the 15,000... closing and opening rank of all the nit’s : http://www.askiitians.com/aieee/aieee-counselling aieee cut off … you can check here … http://www.askiitians.com/aieee-2010/aieee-2010-cut-offs.aspx and 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. all the best . askiitians expert vijay luxmi",
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979abd5d1c18c3026bb1b62bd58f43e9 | a stone with weight w is thrown vertically upward into air from ground level with initial speed v 0. .if a constant force f due to air drag acts on the stone throughout its flight ,the speed of stone just before impact with the ground is what? | askiitians.com | 2021.25 | [
{
"text": "a)initial energy = 1/2 m v^2 work done by air drag is f h potential energy at maximum height h is mgh ( or the work done by/against gravirty) 1/2mv^2 = fh + mgh h = mv^2 /2(f+mg) or writing interms of w = mg , replace m on top with w/g and mg in the debominator with w you will get the result b) initial kinetic energy = 1/2mv^2 final energy = 1/2mv2^2 where v2 is the final velocity work done by f is 2fh 1/2mv^2 = 1/2mv2^2 + 2fh since there is no change in potential energy 1/2 mv2^2 = 1/2mv^2 -2fh w v2^2 = wv^2 -4fgh v2^2 = v^2 - 4gf/w * h but we know h = v^2/(2g(1+(f/w))) = wv^2/(2g(f+w) v2^2 = v^2 - 4gf/w * wv^2/(2g(f+w)) v2^2 = v^2 - 2f * v^2/((f+w)) = v^2 [(f+w -2f)/(w+f)] = v^2 (w-f)/(w+f) v2 = v^2 √((w-f)/(w+f))",
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|
8ed7d15e6f0dfaac0f601fa045d0b880 | i’m bad at geometry and it’s application. keeping in mind that geometrical application is what optics consists of. how should i practice and improve on my problem solving reasoning power? | askiitians.com | 2021.31 | [
{
"text": "@ prakriti what u need to understand is that optics consists of simple application of geometry , and for that just u need some besic concept to be cleared . so, start optics chapter with h c verma , and then proceeedcon with ncert , after hcv completed , u can check out with the problem solving part . u need geometry only to understand the derivatiuon . so,betterto start with h cv ,nd before starting make sure u start with mathematical tools as that is the main thing and u need that before studying physics at all . all the best ..",
"name": "",
"is_accepted": false
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{
"text": "all u need is to learn basics . if your basics are not clear no one can help. i m also a student . i can understand ur problem. i suggest u to start with ease. so use s.l.arora or modern abc then take the question from hcv . it is better to do those things first which is hard for u. happy to help u :=)))",
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|
c4af9b95ac0d03fa080a5693030de301 | what should i opt for if i have a choice between metullargical science in iit mumbai and computer science in bits pilani (pilani campus) as for future prospects (good placements and package) and why? | askiitians.com | 2021.43 | [
{
"text": "hello student, the choice purely depends on your interest only. but let me tell you that bits pilani is also very reputed college and has bits pilani computer science branch has shown some awesome placements in past year.so when ever you are making any decision please have this in your mind that bits pilani is also best rated college even better than some of the iits. dont take a branch just because that is available in some iit choose wisely. i hope this will be helpful. thanks,",
"name": "",
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{
"text": "thank you sir for your pleasing response.",
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|
1137a55a969f0a7015a743c4a9527ec5 | how are placements and salaries offered at bit mesra ?? and how is overall college??? i m getting 194 marks in aieee can i get it ??? if yes than which branch???? | askiitians.com | 2021.25 | [
{
"text": "with 192 marks your rank shouldbe within 8000 .cse is difficult to get .but you can surely try for ece mech elec civil etc... companies like google and microsoft also offer jobs. avg package 3.7 to 4.9 lpa;highest 10.2 lpa.for more check placement on mesra website!!!",
"name": "",
"is_accepted": false
},
{
"text": "you can easily get bit mesra . you can apply for ee or mechanical",
"name": "",
"is_accepted": false
}
] |
|
20bb0df2513e0ac8ba49d7e88b5fe579 | (tan theta – cot theta) (tan^2 theta+ tan theta.cot theta+cot^2 theta) | askiitians.com | 2021.39 | [
{
"text": "dear student it is written as (a-b) (a²+ b² + ab). where a = tan theta and b = cot theta hence it will be a³- b³ = tan³theta - cot³theta",
"name": "",
"is_accepted": false
}
] |
|
4f8b31632749dad9e8caaabd959c97f6 | computers in iit roper or chemical in roorkee | askiitians.com | 2021.43 | [
{
"text": "dear madan first i would suggest you to go with your interest. first observe whether you are more interested in computer science or chemical engineering. if you are neutral for both streams then i would suggest you to go with chemical engineering from iit roorkee as with this option you are getting one of a best stream with old iits. 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. manisha sharma",
"name": "",
"is_accepted": false
}
] |
|
7fdb837aa12ee579d72e8e1e414b5670 | what is the conjugate base of h c l o 3 ? a h 2 o b c l o 3 − c h + d h 2 c l o 3 + | askiitians.com | 2021.31 | [
{
"text": "dear student when an acid donate a proton then the conjugate base of an acid is formed. conjugate acid base pair are hclo3 and clo3-",
"name": "",
"is_accepted": false
},
{
"text": "the conjugate base of an acid is formed when the acid donates a proton. conjugate acid base pair are: hclo 3 and clo 3 − answer",
"name": "",
"is_accepted": false
}
] |
|
28ee45b566c4ab76c84ed11d5e70b820 | in how many units is the number of protons decrease when the alpha particle is released from an radio active material? | askiitians.com | 2021.25 | [
{
"text": "dear rvss, the answer is 2 units",
"name": "",
"is_accepted": false
}
] |
|
f0030b4b63d3ef1e77cc1caba556b17a | pleaes solve the question of determinants and give detailed solution. | askiitians.com | 2021.39 | [
{
"text": "the matrix[ 1 a b ][ c 1 d ][ e f 1 ]where exactly one of a,b,c,d,e,f is 1 and rest of them are as zeros,is invertible.there are such 6 matrices.also,the matrix [1 0 1] is invertible. [0 1 0] [1 0 0]this,there are at least 7 such matrices which are invertible.",
"name": "",
"is_accepted": false
}
] |
|
88c71676e87cdccf62a0287352be4fe1 | is a quadratic polynomial of degree 2 bijective???? explain | askiitians.com | 2021.39 | [
{
"text": "no, in mathematics, abijection(orbijectivefunction or one-to-one correspondence) is a function between the elements of two sets, where every element of one set is paired with exactly one element of the other set, and every element of the other set is paired with exactly one element of the first set. hence, a quadratic polynomial will have maximum 2 inputs for one output and hence, it is not bijective.",
"name": "",
"is_accepted": false
}
] |
|
5f4387cac09db3d2f6c6bf808f5a37ad | why did dinosaures become extinct? how did our scientists know that these animals roamed on the earth once upon a time?can you please explain me? | askiitians.com | 2021.39 | [
{
"text": "dear student due to unfavorable conditions they could not survive, scientists did research, excavation, carbon dating etc",
"name": "",
"is_accepted": false
},
{
"text": "there are lot of extinction theories dinosaurs some are + meteorite crash : scientist urge that a huge meteorite fell on the earth near the gulf of mexico which caused climatic change and led to their extinction. + disease : the widespread of some unknown disease ledd to their extinction + extreme volcano +g radual extinction",
"name": "",
"is_accepted": false
}
] |
|
6376fa4f7418dc2d233b3a2deca5ca5c | eliminating a from the equation xcosa = ycos(a + 2p/3) = zcos(a + 4p/3). where p = pi establish that xy + yz + zx = 0 | askiitians.com | 2021.43 | [
{
"text": "first, use xcosa = ycos(a+2p/3) to find tana by expanding cos(a+2p/3). do the same considering xcosa = zcos(a+4p/3)and then equate the two. this way a is eliminated and you will get the desired result. thanks and regards, deepak kumar askiitians faculty, b. tech, iit delhi.",
"name": "",
"is_accepted": false
}
] |
|
bc33e04a25a5f97d43367ea1299c60db | find maximum and minimum value for cos^2x-6sinxcosx+3 sin^2x+2. | askiitians.com | 2021.21 | [
{
"text": "cos 2 x = (1 + cos2x) / 2 sin 2 x = (1 – cos2x) / 2 2sinx.cosx = sin2x hence, now your equation can be written as:- =(1 + cos2x) / 2 – 3sin2x + 3(1 – cos2x) / 2 + 2 =(1/2 – 3/2)cos2x – 3sin2x +4 = – cos2x – 3sin2x +4 now, minimum value = – [(-1) 2 + (-3) 2 ] 1/2 + 4 = 4 – 10 1/2 also, maximum value = [(-1) 2 + (-3) 2 ] 1/2 + 4 = 4 + 10 1/2",
"name": "",
"is_accepted": false
}
] |
|
73f34e750c53710c08ffe12fa49f350b | 1m soln of glucose reaces dissociation equilibrium 6hcho ? 22 c6h12o6. what is the concentration of hcho at equilibrium if equilibrium constant is 6*10 | askiitians.com | 2021.43 | [
{
"text": "the question is not clear. please rewrite one more time.",
"name": "",
"is_accepted": false
}
] |
|
6d6a3872754ce3ccb04be4a2e22f6b53 | what is cse package for iitk, iitb,iitd | askiitians.com | 2021.39 | [
{
"text": "dear student, degree of hydrolysis of salt of weak acid with strong base = sqrt(kw/(cka)) here kw = 10^-14 ka = 10^-5 c = 0.1 so dwgree of hydrolysis = sqrt(10^-8) = 10-4 best of luck..!!!! we are all iitians and here to help you in your iit jee preparation. 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. now you score 5+15 points by uploading your pic and downloading the askiitians toolbar : click here to download the toolbar.. aman bansal",
"name": "",
"is_accepted": false
}
] |
|
04abc5bfe9a99110609a72db0c746756 | fleming’s left hand and right hand rules are used in (а) generator and electric motor (b) electric motor and generator (c) any rule can be used for any device (d) both are not applied for generator and motor. | askiitians.com | 2021.31 | [
{
"text": "answer: b explanation: (b) electric motor employs fleming left hand rule while for generator, fleming right-hand rule is used",
"name": "",
"is_accepted": false
}
] |
|
4a3ce57e433d4747b6ff3d025af0d15a | 60. devices of higher power used at home have lower resistance. [true/false] | askiitians.com | 2021.31 | [
{
"text": "answer: explanation: true",
"name": "",
"is_accepted": false
}
] |
|
ec0ce949c58b6c2c79a71a2be29f32b6 | please ans. the question which is attached. please........................ | askiitians.com | 2021.43 | [
{
"text": "dear parth viral fibrous protein part of the virion fiber, which is a thin long rod like structure, unique or multiple, appended to the tail of prokaryotic viruses and used for attachment to the host cell. shorter appendages are called tail spikes (e.g. podoviridae) or whiskers regards arun (askiitians forum expert)",
"name": "",
"is_accepted": false
},
{
"text": "tail fibres are made of specific proteins designed to target specific host cells",
"name": "",
"is_accepted": false
}
] |
|
1b164a39f8046f5908780ba44a24c9ad | any one from saharanpur campus of iit roorkee | askiitians.com | 2021.25 | [
{
"text": "hiii this is not the place to socialize .you can ask question if you have else thanks for posting on askiitians. . . . . . .. . ..thanks. . . . .. .",
"name": "",
"is_accepted": false
}
] |
|
2f8960d1bbae84b3c665c0b74e90fb2d | 24.5 gm of kclo3 heated to give o2 which on reaction with h2 horms h2o. this h2 comes from zinc and h2so4 reaction. the amount of zinc required is? | askiitians.com | 2021.25 | [
{
"text": "the given reactions are as follows: 2kclo 3 ------> 2kcl+3o 2 2h 2 +o 2 ----> 2h 2 o zn+h 2 so 4 -----> znso 4 +h 2 now, 122.5 of kclo 3 gives 96 g of o 2 therefore o 2 obtained from 24.5 gm of kclo 3 = 96/122.5*24.5= 19.2 gm of o 2 now 32 gm of o 2 react with 4gm of h 2 to give 36 gm of h 2 o. therefore mass of h 2 reacting with 19.2 gm of o 2 =4/32*19.2= 2.4gm now, 64 gm of zn gives 2 gm of h 2 gas. therefor amount of zn required to produce 2.4 gm of h 2 = 64/2*2.4=76.8 gm hence amount of zinc required for the given condition of reaction is 76.8gm. hope it helps you!!!",
"name": "",
"is_accepted": false
},
{
"text": "the given reactions are as follows:2kclo3------> 2kcl+3o22h2+o2----> 2h2ozn+h2so4-----> znso4+h2 now, 245 of kclo3 gives 96 g of o2therefore o2 obtained from 24.5 gm of kclo3= 96/245*24.5= 9.6 gm of o2now 32 gm of o2 react with 4gm of h2 to give 36 gm of h2o.therefore mass of h2 reacting with 9.6 gm of o2=4/32*9.6= 1.2gmnow, 64 gm of zn gives 2 gm of h2 gas.therefor amount of zn required to produce 2.4 gm of h2= 64/2*1.2=39 gmhence amount of zinc required for the given condition of reaction is 39 gm.",
"name": "",
"is_accepted": false
}
] |
|
3edef48b3be59661848ff5247619ebcc | if a is a skew syemmetric matrix, then b=(i-a)(i+a) -1 is (here i is the identity matrix of the same order as a) 1)idempotent matrix 2)syemmetric matrix 3)orthogonal matrix 4)none | askiitians.com | 2021.43 | [
{
"text": "lets take this is because a is skew symmetric now lets do and (i-a)(i+a) = (i+a)(i-a) ….... try this, putting in the above equation we get b t b = i hence orthogonal",
"name": "",
"is_accepted": false
},
{
"text": "this is because a t =-a in case of skew syemmetric matrix right so why the first line is that very good",
"name": "",
"is_accepted": false
}
] |
|
447761f21cc3b1dcb2e0c06e9d3bfeab | an electric heater of power 1000w raises the temperature of 5kg of a liquid from 25°c to 31°c in 2 minutes. find the heat capacity of liquid. | askiitians.com | 2021.25 | [
{
"text": "dear student, as heat is: q=mc∆t =>pxt=mc∆t =>1000x2=5xcx6 =>c=200/3 j/k. cheers!! regards, vikas (b. tech. 4 th year thapar university)",
"name": "",
"is_accepted": false
}
] |
|
8a3b519b56c583d28db672e2c5b6f6cb | my rank in iit is 10413.is there any chance of getting admission in iit colleges and iam coming under general . | askiitians.com | 2021.25 | [
{
"text": "sorry but chances are negligible because only 10,000 seats are available in iits . so chances are very very less.sorry for the statement with best wishes for future sahil",
"name": "",
"is_accepted": false
},
{
"text": "no, there is not much hope for you as the score you have mentioned here, does not ensure your getting placed at iit, so you should better try getting admission at any one of the following – jain university, bangalore,.................lovely professional university, phagwara,...................christ university, bangalore etc.all of these institutions have a good image for quality teaching and best placements.",
"name": "",
"is_accepted": false
}
] |
|
6e37df1d29fef2968ef574524b4750ad | ptan theta=q then prove that psin theta +qcos theta/pcos theta+qsin theta=2pq/p²+q² | askiitians.com | 2021.25 | [
{
"text": "let theta = a ; because there is some difficulty to write theta. then p tana = q hence tan a = q/p now take lhs = (p sina + q cos a)/(p cosa + q sina) divide by cos a in numerator and denominator. and then cos a is cancelled by each other. = (p tana + q)/(p + q tana) put the values of tana = [p*(q/p) + q] / [p + q*(q/p)] = 2pq/(p 2 +q 2 ) hence proved",
"name": "",
"is_accepted": false
}
] |
|
ef585b650077a07dcfe01e0b36b66f04 | 1. evaluate : (i) sin 18°/cos 72° (ii) tan 26°/cot 64° (iii) cos 48° – sin 42° (iv) cosec 31° – sec 59° | askiitians.com | 2021.43 | [
{
"text": "(i) sin 18°/cos 72° to simplify this, convert the sin function into cos function we know that, 18° is written as 90° – 18°, which is equal to the cos 72°. = sin (90° – 18°) /cos 72° substitute the value, to simplify this equation = cos 72° /cos 72° = 1 (ii) tan 26°/cot 64° to simplify this, convert the tan function into cot function we know that, 26° is written as 90° – 36°, which is equal to the cot 64°. = tan (90° – 36°)/cot 64° substitute the value, to simplify this equation = cot 64°/cot 64° = 1 (iii) cos 48° – sin 42° to simplify this, convert the cos function into sin function we know that, 48° is written as 90° – 42°, which is equal to the sin 42°. = cos (90° – 42°) – sin 42° substitute the value, to simplify this equation = sin 42° – sin 42° = 0 (iv) cosec 31° – sec 59° to simplify this, convert the cosec function into sec function we know that, 31° is written as 90° – 59°, which is equal to the sec 59° = cosec (90° – 59°) – sec 59° substitute the value, to simplify this equation = sec 59° – sec 59° = 0",
"name": "",
"is_accepted": false
}
] |
|
e4dc31c0a91e7d43d8b68db9df756cef | sir, i have scored 145
marks in jee main and
82% in rajasthan board.
is there any chance of
getting top nit like
warangal or calicut...and
wht will be my catgory
rank i belong to obc...
if there is no chance of
these nit then which is
the best nit may i get
with these marks...?? | askiitians.com | 2021.25 | [
{
"text": "expect a rank of before 75000 you can get nit calicut its in top ten nit's arun kumar iit delhi askiitians faculty",
"name": "",
"is_accepted": false
}
] |
|
f43db61288d6b639bedab40f36092e94 | give reasons for aluminium foils are used to wrap food items. | askiitians.com | 2021.43 | [
{
"text": "dear student aluminium is malleable, soft and does not react with food items, so it is used to wrap food items. thanks",
"name": "",
"is_accepted": false
}
] |
|
313d2db67e2cdfe9836c6220f6049eab | . which of the following statements are true (t) and which are false (f)? (a) zero is the smallest natural number. (b) 400 is the predecessor of 399. (c) zero is the smallest whole number (d) 600 is the successor of 599. | askiitians.com | 2021.25 | [
{
"text": "dear student (a) zero is the smallest natural number. solution: false 0 is not a natural number (b) 400 is the predecessor of 399. solution: false the predecessor of 399 is 398 since, (399 – 1 = 398) (c) zero is the smallest whole number. solution: true zero is the smallest whole number (d) 600 is the successor of 599. solution: true since (599 + 1 = 600) thanks",
"name": "",
"is_accepted": false
}
] |
|
8bfc41b33fa81a467c5a8b27c47f1fff | why current flows in opposite direction of electrons movement. even current generates from electrons. | askiitians.com | 2021.31 | [
{
"text": "by convention direction of current is taken to be in direction from -ve to positive potential...ie opposite to electron movement. its just how we assume it to be...nothing experimental about it. pls pls approve the reply if helpful",
"name": "",
"is_accepted": false
},
{
"text": "the current always flows from -ve to positive thats rite.... we call it electronic current..... but for simplicity of the circuits its the conventional current i.e. from +ve to -ve that is most commonly accepted.... its a mere sign convention..",
"name": "",
"is_accepted": false
}
] |
|
7c04b7d671b1adc6002456167cf1a7b9 | in blood what is the true solution that get separated during dialysis as blood is a colloid? | askiitians.com | 2021.25 | [
{
"text": "dear student during dialysis plasma without proteins is separated out . plasma is a colloid due to suspended proteins, ions, clotting factors. with regards mahima askiitians forum expert",
"name": "",
"is_accepted": false
}
] |
|
e9fc5ef35e2172712b03a97690111efc | any one here with iit air around 3000 and is a sc/st/obc please tell me your category rank. my air rank is 3412... | askiitians.com | 2021.39 | [
{
"text": "hi, please check the link : http://www.askiitians.com/iit-jee-2010-results.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. all the best.",
"name": "",
"is_accepted": false
}
] |
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