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|---|---|---|---|
bwaaox
|
Why are OLED screens pentile and do they support full RGB patterns?
|
PenTile is a trademark of Samsung.
Blue LEDs are the hardest to make, and the advantages of PenTile are: a) You only need one blue out of 5; b) the blue can be larger so that the amount of light produced is equal.
What are the VR benefits you'd expect from lower blue levels? I can't think of any.
|
917d7554-8208-480d-be4d-ec4f8d46e6e2
|
bwab74
|
Gnats. Why do they buzz around and annoy me without biting? What is their purpose?
|
> What is their purpose?
That is the wrong question to ask about biological creatures. In order for something to have a purpose there must have been an intent behind it, and an intent requires an intelligence. There was no intelligence or intent behind the origin of animals and there is therefore no purpose. They exist simply because they can.
As for what they are doing it depends on the specific species of insect, but most of the time the gnat bothering you is just trying to reproduce. It is bumping into you at the gnat singles bar, looking for someone to take home and make ~700 babies with and you being annoyed doesn't really matter because it will be dead within the week anyway.
|
b3b1e13a-4026-4538-a3ff-3b04ee96ed02
|
bwaopo
|
Why does medication that lowers your blood pressure help ‘raise’ your johnson instead of medication that raises the pressure?
|
A lot of drugs that lower blood pressure (including Viagra) are Vasodilators. This means that they cause your arteries to widen. This increases blood flow which lets more blood make its way to 'your johnson' so it can do its thing.
|
e4d1db72-36da-4ab2-b634-1a7a2a597bef
|
bwars1
|
What causes the “dope lean” when someone is overdosing on heroin/another opioid? If opioids are meant to loosen you up, why does the body appear to be locked in that position?
|
Pretty much it comes down to their body still functioning, even in a really messed up state. They aren’t technically unconscious, and their natural instinct to stay upright is still going strong. Their body keeps falling but the natural reaction to straighten back up before they collapse happens.
|
5752660c-83f1-4cbe-a06b-32678a8616ec
|
bwayyk
|
- How do they track fish population?
|
Here’s one way I remember hearing about:
You throw a net in, you get 20 fish, and tag them all. Then put them back. (This is how you would do it for lakes, I think)
Later, you cast your net, and again pick up 20 fish. If, for simple math example, you found half of that (10) to be tagged, you’re going to assume that the lake has 40 fish in it, because your sample leads you to believe that the fish you picked up before make up approximately half of the overall population.
Obviously multiple and larger samplings over more time will give you better data!
|
531d597f-a55e-4fa5-bcb6-2a172b3aa5e3
|
bwb1fu
|
At point point to we say some "died of old age" or "it was just their time" vs enumerating a specific cause like heart failure?
|
The idea that we're fated to die and that it just happens is itself going away. There's always a specific reason, and we're getting better at identifying it. If the person was 95 and suffered heart failure, it's appropriate to say "died of old age" because basically, your organs have already severely degraded and the heart was just the first to go.
But I have confidence that modern medicine will solve aging soon, and we won't be so chill about old people dying anymore.
|
472c86a3-fe82-4010-8cd7-7c98aac22d92
|
bwb2sj
|
Why do you feel tired if you get too much sleep instead of feeling extra well-rested?
|
If I'm not mistaken, sleep cycles or something like that, so you keep sleeping and slip into another cycle which you interrupt when you wake up.
|
ef034d94-9ca3-46f9-9d35-f7a3a4460e89
|
bwb51y
|
What is the 4th dimension, how does it work and are there an infinite amount of possible dimensions?
|
Mathematically, there is no limit to the number of dimensions you can consider in a space. Even infinite-dimensional spaces come up fairly regularly. In a three-dimensional space there are three independent directions to move in. You might label these up/down, left/right, and forward/backward for convenience, but which three directions are chosen is mostly arbitrary. Phrases like "the second dimension" or "the third dimension" are ambiguous, like if you had a triangle and started talking about "the second side of the triangle". Unless you label the sides in some artificial manner, it's not really meaningful, and the same goes for dimensions.
A four-dimensional space would be one with four independent directions. You can't really visualize it since human brains evolved for 3D spatial reasoning, but there's nothing special about four-dimensional spaces compared to three-dimensional ones. In physics, one of the major revolutions of the early 20th century was the realization that you can deal with physical reality in terms of four-dimensional "spacetime" rather than just three-dimensional space. This means we can consider forward/backward in time in addition to the three directions of space, though this direction does not have quite the same properties as the others. Sometimes pop-science articles and sci-fi will use "the fourth dimension" to refer to this idea of including space and time together in the same structure, though again there isn't really any intrinsic ordering associated with dimensions.
|
2b229614-8272-451a-a789-c13c6cccf722
|
bwbcov
|
How does double jeopardy work when someone is falsely incriminated?
|
In the US, courts do not find individuals "innocent." You are either "guilty" or "not guilty." "Not guilty" doesn't mean "innocent", it simply means the government failed to meet the burden necessary to establish your guilt. You could very well still be guilty, it just couldn't be proven beyond reasonable doubt.
When a guilty verdict is appealed, you are not being tried again for the same crime. Rather, the previous trial is reevaluated to see if some breech of law or protocol was violated that warrants a change in your verdict.
The point of the double jeopardy restriction is the prevent the government from continually trying someone over and over until they secure a conviction. Once you are found not guilty of a crime once, that's it, no redo's for the government. A citizen, however, is allowed to continue to try to over turn a conviction as long as they have the resources to appeal, until they reached the highest court that will see their case.
|
d29472a9-9582-4900-8d19-c6becf1bcc90
|
bwbcrn
|
what is that sound you hear when you close your eyes and squeeze hard?
|
Come join us on r/earrumblersassemble
You are contracting your tensor tympani muscle which is in the middle ear. The sound can also be heard when the neck or jaw muscles are tensed as when yawning deeply.
|
4b160ee6-55e5-4479-99d5-cdedf825d93b
|
bwbcxc
|
Why don’t our butt bones give us bruises when we sit?
|
Sudden impacts cause damage to the blood vessels which bleed into the surrounding tissue, causing a bruise.
Leaving on something generally involves a slower increase in pressure. However, this pressure can still cause damage if sustained for long enough. Pressure sores are a huge problem in patients with long term immobility and lead to break down of skin and infection, as well as a lot of pain.
|
b275e829-ccb9-4007-ad87-6bbc35440457
|
bwbeda
|
How do random number generator programs work?
|
They start with a seed number and perform a number of mathematical operations on it to produce a new number. This number is then used with the same operations to produce the next number, and so on.
The mathematical operations are chosen to give the illusion of randomness by adhering to certain properties, usually including: no patterns or repeating strings of numbers and being statically indistinguishable from sets of "true" random numbers.
|
ba0d2f53-f85a-4381-9f54-7ded9d0d60cb
|
bwbynb
|
Why are there many gpu manufacturers (zotac, Asus, msi...) but onlz 2 pc CPU manufacturers?
|
They're graphics card manufacturers, not GPU manufacturers. For the GPU the two largest manufacturers are nVidia and AMD, it's pretty much like with CPU's.
They develop and create the GPU. Third party graphics card manufacturers can then make a deal with Nvidia to use their GPU. The GPU design can't be changed, but everything else that's on a graphics card, such as ram or voltage controllers. Besides that, they can increase the MHz of the GPU.
If you buy a CPU you already buy the chip itself. There's pretty much nothing, besides overclocking, that a 3rd party manufacturer could change. And Intel and AMD rather sell their own products.
I must say though that this only applies for the Desktop/Laptop market. When it comes to other things, such as smartphones, the list of actual GPU and CPU manufacturers significantly increases.
|
b045cd7d-a1de-4661-95dc-9a79b02732d5
|
bwbyws
|
Why do Wifi routers need to have antennas visible when mobiles phone doesn't?
|
They can. There are many routers available without external antenna.
However, it's a use case thing. The external antenna is a bit better, and is adjustable to help you get the most out of your router, which is something you're going to set up in a corner somewhere and leave. It's not a big deal if it's got some extra limbs sticking off of it.
You're phone on the other hand, has to be small, compact, and able to fit into a pocket. No one would buy a phone with an external antenna, even if it did improve performance.
|
72079782-aaea-4f25-a2be-c2bc42d82bb8
|
bwc1be
|
what causes bruxism (night grinding)?
|
Dentist of 25 years here. There is no definitive cause of bruxism. There are many theories on possible links to bruxism and there may in fact be different causes for different people. It is mostly an unconscious habit and can occur in young and old. It does sometimes run in families so there maybe a genetic component. There are certain bite patterns (especially bite interferences) which seem to be more prevalent in bruxers but there are people with perfect bites who grind like crazy as well. It seems to be heightened during stressful life events. It is not always nighttime as people often catch themselves doing it during the day as well although this is more common among clenchers . Some people don’t grind they just clench their teeth very tightly.
Some common signs of bruxing/clenching are: Bone growth called tori around the roots of teeth especially inside the bottom jaw and in the middle of the palate. Notches or root exposure at the gum line. Flattening of the cusps of the teeth. Increased sensitivity. Increased mobility in teeth (side to side) Muscle tension/fatigue or pain. Jaw joint pain. Headaches especially first thing in the morning.
There is no definitive way to stop. It tends to be cyclic and has spurts of varying intensity. Some people have had moderate success with hypnotism. Mostly we try to protect against the effects of grinding by using a night guard. It is important to use a night guard made and adjusted by a dentist because over the counter solutions can cause more harm than good such as altering your bite,over-eruption of teeth or trauma. Anecdotally, it seems to have become more common in the last 5-10 years, but that maybe because people are keeping their teeth longer and my clientele is getting older.
I think that covers it...Probably not ELI5 but the best I can do.
Cheers!
|
0d2ce4d6-d159-4821-a21c-61630162fb2a
|
bwc62e
|
Why does ventilated air not become warmer?
|
Theoretically it is, but the change is almost unmeasurable. Make that fan do 30000 rpms and you could measure it. Pressure changes would have more of an effect on air temperature than friction.
|
ceace1b2-cad7-4479-a2e8-0b216754f3c6
|
bwc7zm
|
How do animals develop instincts
|
There are not a lot of true instincts animals are born with. Humans turn their head when something presses against their cheek and suckle when something touches their mouth. This helos them find a nipple and drink. Almost everything else is learned.
Animals learn behavior through imitation of their parents and play. Birds teach the young birds what songs to sing. Cats learn to pounce from play.
Animals raised with humans do not fear humans, like a cat and chick raised together treat each other as siblings
This may not be true with simpler animals such as insects
|
788f1c6f-5005-419e-bd90-4eb944a13110
|
bwc86c
|
Why are the sounds of the beach so calming?
|
I would highly recommend listening to [The Hidden Brain Podcast](_URL_0_) called Our Better Nature. It talks all about the research showing the importance of nature on mental and social wellbeing. It discusses research done on having people smelling grass or looking at pictures of a forest while having an MRI taken of their brain. All the research points to outdoor spaces as being significant for how we feel and how we interact with others.
|
ffc8b5a9-e641-4f26-b337-50efd6b97822
|
bwcbaa
|
Why after a couple of days of getting 8 hours of sleep, I feel more more energized with a night of 5-6 hours of sleep?
|
How energized you feel when you wake up has nothing to do with how much you sleep, but has to do with when you wake up. When you sleep you go through [many stages of sleep](_URL_0_). If you wake up when you're in deep sleep (stage 4), you feel like crap. If you wake up when you're in light sleep (stage 1), you feel refreshed. Each cycle is ~90 minutes, so many people recommend figuring out how long your cycles are and timing your sleep and wake up times to match your stage 1 sleep.
|
c1407a52-9718-48a4-83f6-6841453f5c7f
|
bwcl5t
|
Why are infections of the colon so much less common than urinary tract infections despite the fact the colon appears to be the ideal environment for bacteria to thrive?
|
The colon is expected to have bacteria in it and is protected from it. Whereas urine is sterile so the urinary tract is not very protected from bacteria as it rarely encounters it.
|
7019efb7-59a3-4fea-932c-6abfb6fd01f3
|
bwcp9i
|
how do you know how big the universe is?
|
We don't.
We know how big the OBSERVABLE universe is.
For clarification :
Light takes time to travel. We can only see things if they emit light (That is how our eyes work).
The most distant objects we can see, and the light that they emit are X light years away (13 billion something) meaning that any objects that are farther away than those objects cannot be seen as their light has not reached us yet.
Unfortunately for those of us that want to know what is beyond the observable universe, those objects are expanding away from us faster than the speed of light (kind of a relativity breaking phenomenon, but that is a different conversation) so we will NEVER see them (unless of course they start coming back at us.).
So what we can see is what we can measure. It is an unfortunate limitation of science and the human condition. We can only measure what we can sense.
Edit :
What you are looking for is information on something called Red Shift. Red Shift is a way to measure how far away something is, and how fast it is moving away from your reference point. From there it is just math. Light, when the emitting object is receding away from your reference point, shifts to the red end of the spectrum. How much shifting occurs is how they measure the distance to the object. So if we know three things :
The object is visible/
How far away the object is/
The static speed of light/
We then get how long it took for the light to get to us.
|
73181b68-eaea-4f62-9a2d-5d3b3f2749e8
|
bwd1in
|
Why does our blood pressure go up after a typical meal? Is it harmful if someone already has high blood pressure?
|
Your blood pressure goes up whenever your body does work, to get more blood and oxygen to the area doing work. Moving food through your system requires muscle movement and digesting requires oxygen. So you need blood to digest.
It doesn't matter what causes high blood pressure, the effect of high blood pressure is bad. It just matters how high it gets, not the cause.
|
facbbc00-9cc1-45f8-8ca3-fbf7ffd95049
|
bwdgoj
|
how do skate boards stick to feet in the air?
|
They don't stick to your feet at all. You might notice that skaters often reach down and grab the board when doing certain jumps.
My guess is that they only appear to stick together, because all things fall at the same rate. So the skater's feet falls at the same speed as the skateboard, so they stay together.
|
d1e31890-3d90-4078-af12-5f345c854c7d
|
bwdq86
|
why does restricting blood flow to an area make your veins pop out even more in that area?
|
Pressure. Veins are "drain pipes" for the blood that has already been pumped through the body to get back to the heart. They are low pressure compared to the higher pressure in the arteries. By pinching them off and restricting this pressure, the veins dilate (expand and "pop out"). So you are not really restricting blood flow to the area unless you are putting pressure against an artery. You are actually restricting blood flow from moving away from the area below it.
|
bd9024b2-cf48-4e63-884b-0286d64da2c2
|
bwdr3c
|
Why do rockets spin on their way up? What purpose does the spinning serve?
|
Spinning helps with keeping a projectile straight, for bullets, arrows, rockets, and sports balls.
If you are American and watch football you’ll have noticed when they throw it they put spin on the ball, or throwing a vortex (the football with fins on it) the fins are angled to provide spin that gives it balance.
The reason projectiles need to spin is so that if it has a tiny wobble the spin corrects it.
|
95dfa23e-2a51-48fb-80ee-9ab89dfad93d
|
bwds0x
|
What does Einstein meant when he said a person in free fall wouldn't feel any force / weightless?
|
> Is the feeling of falling just the wind hitting my body?
Yes. In an atmosphere, you would only feel the pressure of being forced through it (The wind blowing against you). Without an atmosphere, you wouldn't feel anything. Only the initial acceleration would be felt. This is the same reason when driving on the highway or flying in a plane, you do not feel like you're moving; You only feel the acceleration and deceleration.
|
7daf44c7-c5f3-4334-b9af-7ebfcfe1fbe4
|
bwe0vn
|
What causes Florida to get wildfires?
|
Large parts of Florida are sandy, not swampy. It rains briefly every day during the hot season in many parts of Florida, but that just soaks into the sandy soil or evaporates in the high heat. We have large pine forests and there are plenty of downed pines due to hurricanes over the years. High heat + dry areas + downed pines trees = forest fires.
|
e5b89737-3667-4c47-8355-ea9b2fab23a2
|
bwebpl
|
How do apps like Apple Maps and Google Maps know how much traffic is present on a road? and how do they calculate the destination times accordingly?
|
There are many ways. One such way is to buy anonymous data from cell phone companies who track how many of their users move from tower to tower and how quickly. Given the geometry of cell sites, they can tell which users are likely on a nearby highway at a given time and track them as the move down the road and connect to another cell site.
& #x200B;
They can also use data provided from app users.
& #x200B;
As for the rest of the question, I can't say.
|
a3f8df4c-2a10-43e8-99a1-de54022ad449
|
bwecx1
|
Why do things get sun bleached through a window but you don't get a sunburn when sitting near a window?
|
Ultraviolet rays are broken down into two types: UVB and UVA. Normal windows block most UVB rays which are the ones responsible for sunburn. However, they still let in UVA rays, which can still cause bleaching.
|
db6cf9eb-b67b-4eed-8229-330c94df7d74
|
bweep8
|
Why is the water in our drinking glass clear and colorless but all the water in Earth’s rivers /lakes/oceans blue?
|
Normal white light is made up of a mixture of colours. Water absorbs the red light a bit.
Only a tiny amount of red light gets absorbed by a 2 inch wide glass of water. But when you look across even a few meters, like a swimming pool or even bigger, almost all the red light is gone, and it looks blue. This absorbing behaviour is called 'attenuation' and lots of water means lots more distance for the light to travel through, and so lots more distance for the colour red to 'attenuate'.
|
33665e6a-face-409b-ab7a-2bcff28b2a61
|
bwehvg
|
How do our stomachs that are protruding by bed time flatten overnight?
|
Food in the stomach gets broken down and partially digested, and is then moved into the intestines for further digestion. After a full night's sleep, by the time you wake up, your stomach is emptied of food (on average it takes about 4-5 hours for the stomach to empty after a full meal, depending on what you ate). An empty stomach makes for a flatter belly.
|
3cdc4b88-c3a4-4e65-b5f2-b71ce4c09de4
|
bwekxi
|
why people on antidepressants must avoid grapefruit.
|
Compounds present in grapefruit can inhibit a liver enzyme (cyp3a4) that some antidepressants are metabolized by. Inhibiting the enzyme will result in higher blood content of those substrate, which may be an issue
|
f811d3cd-020d-4d26-a769-da5d82d44b35
|
bwfkff
|
How do they trap the air inside bubble wrap without leaving a hole for the air to escape through?
|
The bubbles aren't blown up like a balloon; rather two sheets of plastic are "stamped" together in a honeycomb pattern, leaving empty (air-filled) bubbles.
|
1f031383-3f84-4f8e-a887-100745a035cc
|
bwfsib
|
why does calling internationally cost so much more than local calls?
|
The increased cost reflects the cost of maintaining the cables and infrastructure needed to make those calls.
Contrary to commonly head belief International calls use underwater fiber optic cables, not satellites. But even so the cost of laying and maintaining those fibers is very expensive, and that cost is passed onto the consumer.
|
0c1e86be-89d4-44f4-8565-40111ad5aa67
|
bwft31
|
Where does the wax in a candle go when it is burned?
|
Up in smoke.
But no really, the materials break down and get expelled into the air. It's fuel for the candle.
|
b978817f-dc74-4801-95fa-a5e120ae9dc4
|
bwft5z
|
Why are people so against 5G?
|
Because people have such privileged lives these days that they basically have nothing better to worry about than what may or may not be killing them and who may or may not be conspiring to facilitate this killing.
|
8dae890f-5d82-464a-9cba-d5880ec250f8
|
bwfut2
|
Why do some drinks make you pee more often than others?
|
Without going into too much detail, your kidneys filter substances and water out of blood and return what is needed into blood. The less water they return to the blood, the higher the volume of water that goes to the bladder, which gives you the sensation that you need to urinate. Caffeine (amongst other substances) causes less water to be reabsorbed into the blood, so more goes to the bladder.
|
9130cbd4-722e-485c-9562-9323d82df608
|
bwfxbv
|
Why does mac-n-cheese not taste cheesy after you reheat it?
|
So macaroni and cheese changes when it gets cold in a few different ways. The oils in the cheese sauce get cold and harden up and separate, while the macaroni continue to absorb more water. Some water is also lost if it isnt in an air tight container. This turns what is left into a starchy and oily mess. You can reheat it better by adding in a bit of milk, this replaces the water that was lost and helps the oil get mixed back in better! But it still loses a bit of flavor, that I don't know exactly why. I just add a bit more cheese and some salt! Almost good as fresh.
|
ff67a5bd-74a4-4f67-a3c7-404b4a687de7
|
bwg38s
|
I’m watching the Bart’s Comet episode of The Simpsons and I was wondering what Principal Skinner is saying while looking through the telescope: ”six hours nineteen minutes right ascension, fourteen degrees fifty-eight minutes declination...” And so on
|
As you probably know, the Earth is divided up by imaginary lines called latitude and longitude. Any position on the Earth can be described by its latitude and longitude.
We do a similar thing to describe the location of objects in the sky. Right ascension is how far the object is from an arbitrary "east-west" point in the sky - specifically, the location of the sun on the vernal equinox, the first day of spring. Declination is how far above or below the celestial equator is. So something with 0° declination and 0° right ascension would be directly overhead on the Earth's equator on the first day of spring. Polaris, the north star, is very close to 90° declination because it's directly above the north pole. (its actual declination is +89° 15′ 50.8″)
|
9210861d-49cb-484b-91db-8a3ed9f62b11
|
bwg6au
|
The feeling you get when it feels like someone is near, or someone might be watching you, what is that? How do we sense it? Is it just a gut feeling?
|
Honestly, your brain has a lot of signals coming in from our 5 senses each moment... We filter most of those out.
Add to that confirmation bias and psychic BS in pop culture and we are all convinced we can "feel the presence of others" while we probably just heard something/saw something but didn't interpret it fully
|
ee71ba18-3549-473d-bea4-004cd1fe8f43
|
bwga6z
|
How do weed killers just kill the weeds and not surrounding plants, flowers and grass?
|
Depends on the weed killer for specifics, some are non selective and kill any plant they contact. Like Roundup prevents the plants from making the amino acids it needs. And will kill almost any plant.
Selective herbicides that you might use on a lawn are selective broad leaf killers and generally don't harm grasses. And they generally disrupt the ability to create proteins that grasses don't make.
|
dc01a05d-c06e-45e5-8730-c496006e859e
|
bwgfks
|
Bipolar disorder mania and depression. What causes/controls the cycling?
|
This is extremely over simplified- what people usually think of as “regular” depression, is someone’s body not making enough of something (serotonin, dopamine, etc., depending on the specific person). Fun fact: serotonin is not as often the direct cause for depression as we used to think, which is why medicines are improving because the average anti-represent that increases serotonin levels doesn’t always help the patient.
With bipolar/cycling disorders, the persons body switches between not making enough of something, as mentioned above, and making too much of something. This can either be your body trying to re-balance itself after a depression, or it can be that your body reacts to everything in extremes. What usually triggers a person to get a little sad will trigger your body to react much more extremely and cause a depressive episode, and what usually would trigger a persons body to be happy by releasing feel good hormones, would make your body release way more of those hormones to cause a manic episode.
|
1f4c66df-588a-470d-ae29-6e9c1b525767
|
bwguyn
|
Why is mint the default flavour of toothpaste?
|
Mint causes a feeling of freshness and people associate freshness with cleanliness. Simple as that.
|
0d1eae2d-2ab6-4904-893a-b4c317f513ca
|
bwhd5l
|
Why do some baseball fields have higher walls and seemingly more difficult standards for hitting a home run in baseball?
|
At the end of the day, tradition. Back in the day, baseball fields were built wherever there was space, with as much seating as they could get in comfortably, with uniformity not really a big factor. Which is why you get big outliers in older stadiums, most famously Fenway Park in Boston, which was built to fit in a tightly-packed city and which famously had to deal with a very shallow left field by building an extra-tall wall called the "Green Monster" to compensate.
So because of the history associated with those classic old parks, it was just sort of accepted that field dimensions would be more variable than other sports, which require standardized field sizes. Modern fields have to fit within a relatively small range for their outfield fences, but there's a grandfather rule in effect to keep old, historic parks like Fenway from having to be bulldozed. If you look at most fields built in the last two decades, they've been able to build away from city centers, where there's space for a nicely-shaped field and plenty of seating.
|
0dac02c5-af13-4006-bafd-1d1fb8bead19
|
bwhf8g
|
Why are G-protein receptors the target for more than half of the drugs?
|
G-protein receptors are very common receptors that need to be activated in order to trigger a cascade of reactions within the cell. They are involved in a large amount of common processes that can often go wrong in people (e.g. inflammation, glucose homeostasis, etc.). This makes an obvious target for drugs because they stop these processes completely (because binding of G-protein receptors is often the first step) and they are easy to target because you just need a complementary molecule that can be transported in blood.
|
c646014a-3734-4af0-974a-2718be6a88f7
|
bwhmcp
|
Whats the meaning of battery mAh, how will I know if the charger’s output affect my phone’s battery?
|
mAh stands for milliamp hours. It basically the max storage capacity of the battery.
In general the output from a charging block (the part that plugs into a wall) determines how fast your battery will charge. Standard small blocks allow you to charge at 1 Amp. Larger blocks will let you charge at 2 amps or more. The more amps, the faster the charge. Also, within your device there are often limiters that prevent your device from overcharging or charging too fast.
|
20b18178-6325-4c07-845a-c272aaa79370
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bwhvc3
|
How come your car's aircon needs topped up and recharged, but your fridge in your kitchen does not?
|
Your fridge is a pretty well closed off system where all the joints can be firmly sealed, and then it never moves for 10-20 years.
Your car has a lot more flexible hoses and seals because it has to move the refrigerant from a compressor somewhere in the engine bay to your AC unit and back, and it does this while the whole thing is bumping and vibrating all the time. Those flexible bits tend to wear out over time and stop doing a great job of keeping the system sealed, so some refrigerant leaks out.
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72b0008c-03cb-4334-97f5-4b649a93c593
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bwi4zl
|
Why do people start laughing when they are experiencing despair?
|
Laughter is the response to absurdity. If you were suddenly overcome by crushing despair, wouldn't you laugh at the absolute ludicrousness of the notion?
I would. I mean, what else are you supposed to do?
|
fc4f206b-727e-4ad8-ac3a-d28a5ab07792
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bwih1p
|
How do flavors in foods “marry” after sitting together. Why does it taste different than eating immediately after combining?
|
Flavors can be carried by fat, water, alcohol etc. Letting a mixed food sit for a bit before serving allows time for the flavors to be extracted from the components, but also for the flavors to be absorbed into the other ingredients.
|
e6d11e2c-aa88-44f8-b37d-fd2bfebf3c9b
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bwire8
|
why do a group of people get charged for something that only one person does?
|
It is called *being complicit in the crime*.
In your example, everyone should be charged for assault at a minimum. Regardless, the idea is that you had at least 5 people who had the opportunity to intervene in the stabbing but did not. They were also participating in the event that lead directly to the stabbing happening.
|
ef922177-f44b-4690-9ae4-ce83a7e15f09
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bwirr0
|
If I dissolve tylenol in a cup of water and drink it, will it take effect sooner since it's already disolved?
|
Yes. You can also chew it or break it into pieces and swallow it. More surface area means it will digest and absorb more quickly.
|
a0021816-a562-4128-85c2-73a39d96813a
|
bwitm6
|
How do polarized lenses work?
|
Waves have a direction to them. Tldr:. Waves have a direction that they vibrate like up and down, or side to side. Polarized lenses essentially filter away one "direction" of the wave.
It's easiest to imagine ocean waves, as they go up and down as they cruise along.
If you put a barrier in the way you'll stop the waves, this is normal tinting on sunglasses.
If you put a gap in the barrier you might let the waves through. If the gap was up and down waves could get through easily (they also go up and down) If instead you left a horizontal gap, or a slit, in the barrier you'd still stop the waves, as they can't fit through. They will also up against the roof and floor of the gap and be stopped.
Polarized glasses use this to help reduce glare. Light can have it's wave go any direction at all. But when it strikes a flat surface, like a car hood, windshield or even the road it polarizes the light. Any light that was vibrating the wrong way gets squashed as it stands against the surface. If it was vibrating the right way (along the surface, instead of into it) it'll survive and bounce off.
You polarized lenses have super tiny slits in them that will block light that is vibrating "horizontally" as that is the light that bounced off objects that tends to produce glare. So they squish that light out, helping by not just dining all light, but eliminating light from sources that give strong glariing reflections.
As for making things crisper, this is because it removed some light based off of an objects surfaces and edges. This helps creat contrast with the surfaces that weren't filtered, helping you see it better. Some animals can naturally detect polarization!
A couple other fun things to try:. Look at a phone or computer screen and turn your head sideways. LCD screen are highly polarized, and sometimes the colors are different directions.
Looking at a clear blue sky with polarized glasses should show you a darker band crossing the sky, where light reflected from the air itself is polarized.
Hold two pairs of polarized glasses so you can see through them both. Rotate one so it's 90' to the other.
|
4a6d1b80-e3b0-43eb-b61f-458c3d501acd
|
bwiunj
|
The economics of skyscrapers. With all the advances in transportation, networking, and the rise of inner city costs, why do companies still find it financially beneficial to set up shop in congested areas?
|
The main answer economists have is "agglomeration economies". Basically, firms are more productive when they're located close to other firms, especially those in the same industries. There are lots of theories for why this is, though they're kind of hard to test. There's a lot more opportunity to share ideas, employees, and even favorable regulatory environments when companies are located close together. Silicon Valley is an extreme example of this. Because the tech industry is especially fluid and based on the types of things that agglomeration economies enhance (mainly people and ideas), there's a lot of incentive to keep everything close together, and that counterbalances the increased costs of doing so (which is also pretty small for tech - all you need is office space and some computers).
An emerging answer is that it's all about where skilled workers *want* to live. First, some people just like living in cities. You can walk instead of drive. There are lots of restaurants, stores, and cultural attractions, etc. People like that will be more willing to work for a firm if that firm is also located in a city. Second, urban agglomeration provides employees with a kind of job insurance. If you move to the middle of nowhere to work for a firm that's the only employer, what do you do if that firm fires you or stops operating? You have to move, and that's expensive. If you take a job in a big city instead, you have the ability to change jobs without changing where you live.
|
e927b3d9-c0b0-4ea8-a450-9fbd9b2819b9
|
bwixir
|
What is 5Ge that AT & T is offering and how does it differ from 5G?
|
5Ge is the rebranding of AT & Ts LTE evolution which is a quicker slightly more advanced LTE network. Real 5G is a giant leap ahead on technology. So the biggest thing is download speeds. 5Ge would be between 50 and 100 Mbps. Which is good but real 5G can be closer to 1000 Mbps. AT & T is hoping people will think it is 5G and sign on. Real 5G actually requires a new phone with a different antenna. Currently not a lot available.
|
3b599eae-5100-4c40-b517-220b4e8a1412
|
bwj3yu
|
What Nietzsche meant when he said 'God is Dead'?
|
He meant that the Enlightenment killed the possibility of belief in God due to the rise of scientific rationalism.
It also has to do with the moral vacuum that was left in Western Civilization since we couldn't point to a divine being to justify what is right and wrong.
But, that lead to Nietzsche's belief in the Power of Will, and his idea of the Übermensch. People who would form their own morality and act upon it, which was the true expression of a mature "Race".
It's interesting to note how the Nazis and now the neo-Nazis used the concept of the Übermensch to bolster their numbers when it's actually the opposite of what Facism needs to flourish. We can thank his sister for that bullshit.
|
c96b737b-5d5e-4451-a16b-ffe1db40e464
|
bwj7ga
|
Why does petting/playing with our pets make us happy? Even if the pet is sleeping we still feel happy just from touching them?
|
My link was removed, because I didn't also explain. First here's that link again:
_URL_0_
While researchers aren't 100% sure why, when we pet our dogs, look at them, or even just think about them, our brains release some "happiness" hormones, like oxytocin. Oxytocin is the same chemical that mothers' brains release when suckling a newborn, and it's also released in the brain of her infant. Similarly, dogs' brains have been shown to release happy hormones too, so they love us as much as we love them!
|
24453302-3a73-4be1-bae2-ac5f6940f5f6
|
bwj9qw
|
What is the purpose of different processors on the same phone?
|
Samsung has a contract with Qualcomm to use their chips in the United States. Do some research on it as it's kinda interesting! They've been locked in with Qualcomm for a long time. Everywhere else samsung produces their own Exynos chip.
|
970d5f33-c9d3-4793-9bfa-194ee8eb0f57
|
bwjbku
|
How come your organs, skin and bones can heal, but not teeth?
|
Teeth do heal, the reason you need fluoride in water is because it helps your teeth repair damage. It's just pretty common to have teeth get decayed way past the limits of what can heal. Like your arm can heal a scratch in a few days but if you cut your arm off it's never growing back. If you have a microscopic weak spot in a tooth in a few days it'll harden back up, but if you have a hole from damage or bacteria chewing a pit in it it's never gonna naturally recover from that.
|
68b664f6-4528-408d-878f-1a81ad280f6d
|
bwjfbi
|
Why do bugs flip over when they die?
|
All bugs, insects, arachnids, chiadropods, etc, have in their genetic programming a deep-seated desire that is borderline biological imperative to learn how to breakdance. As death rapidly approaches, they realize they have left this innate biological drive unfulfilled and quickly start attempting to rectify that, flipping over, kicking their legs in feeble imitations of the sickest b-boy moves they may have seen in their short lives. Unfortunately, the small amount of time they've set aside to learn a completely new skill typically means they really suck at it. Surprisingly, it's the embarrassment of ever having tried in the first place that finally kills them.
|
9335a946-c5f6-4b5a-8768-60d380f2cdb5
|
bwjhxv
|
why is it so hard for me to sleep without background noise like TV or the radio?
|
You probably learned this behavior overtime. By intentionally or accidentally sleeping with background noise, you developed a sleep pattern that now requires external noise... so its a routine. These sleep routines can be both good and bad. But they can be broken with time and patience. Try sleeping without noise.... it may take a few weeks.
|
d92ad83a-59e7-4501-af5e-795c34bb1047
|
bwjifa
|
Why when inhaling water vapor (like in a hot shower or humidifier) is fine, but even the slightest inhalation of liquid water stings our sinuses for a period of time?
|
Air saturated with water vapor at 37 degrees Celsius contain 44g of water per cubic meter. A single normal breath is approximate 0.5 liter so there is 2000 breath per cubic meter of air. The result is that there is 22mg of water in a normal breath. 1ml of water have the mass of 1g So you need to breath in 1000/22=45 times to inhale 1 ml or 227 times to inhale a 5 ml tea spoon of water.
Normal breath is 10-20 times per minute so you talk about 11-22 minutes to inhale a teaspoon. In practice the water in the air you breath in will not condensate in your nose but will be exhaled back out.
& #x200B;
Human breath out a lot of water each day and we loose 300 to 500 milliliters of water by breathing it out per day. For 300 ml/day that is 12.5ml per hour or 2,5 teaspoons per hour. That is on tea spoon per 60/2.5= 24 minutes. So our normal breath out is approximate the same as berating in saturated air with water. There is a reason that you see condensation if you breath out on a cold object and fog the windows if you sit in a cold car with the engine and fans off.
& #x200B;
So the explanation is that there is not a lot of water vapor in air compared to even small amount of liquid water and that air saturated with water is what you breath normally. So the air you breath in have the same amount of moisture that the one you breath out.
|
d5578e4b-f8c8-4c02-aec4-f360ac2126cd
|
bwjj3g
|
The 2008 Financial Crisis
|
The government wanted to help more poor and middle class people buy their own homes instead of always renting them. So they put policies in place that made it easier for people to get home loans.
Many more people bought homes, which made real estate values increase. They paid back their loans regularly, so it was considered a safe loan to make.
Wall Street banks can make super risky bets and they can make safer ones. They thought that since people regularly pay back their home loans (mortgages), this was a safe bet.
There were two problems though. Because real estate prices were increasing so much and so fast, people started buying houses, holding them for a year, then selling them for a profit. This is called a bubble. A $200,000 house might be sold for $250,000 to someone because they think they will be able to sell it for $300,000.
The other problem was that it was incredibly easy for people to get cheap home loans. Even relatively poor people who couldn't really afford to buy a home were buying them.
Together, these two issues meant that the once safe and boring mortgages were no longer safe and boring. But investors still thought they were safe and boring investments.
Then the housing bubble burst. That $300,000 house that everyone was fighting to buy dropped back down to $200,000 like Cinderella's coach turned back into a pumpkin. Poor people were stuck paying a mortgage on a $300,000 house even though the home wasn't worth that much. People couldn't afford to pay back their mortgages.
The crisis came in because now suddenly all those institutional investors lost a ton of money. And those institutional investors managed money for retirement accounts and large companies. Plus, banks were making even riskier investments because they thought they were offset by these safe mortgage investments. Then when they realized that they were exposed to more risk than they planned, they pulled out of those other risky investments and lost even more money.
As such, those banks started to go out of business. When the banks went out of business, the other businesses that used those banks also were at risk of going out of business.
Luckily, Bush and Obama (they worked together, despite their differences) to implement a bailout plan for the banks, among other interventions. This kept the banks from going under, which prevented a domino effect of other businesses from going under too. Since then, the US has been in an 11 year growth market.
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eff6e7a3-733d-4c75-bb55-1f88e5b54f8c
|
bwjuzz
|
Why does 70 degree (F) water feel so cold yet 70 degree air is fine?
|
Water is a fantastic at absorbing heat. It sucks the heat right out of basically anything put into it including your body. Since your body is built to operate around 98.6 it is quite obvious to your senses when 70 Degree (F) water is sucking that away. We experience that as a feeling of cold.
Air on the other hand sucks pretty hard at heat absorption. So the drain on your body heat is much lower and therefore it feels less cold.
|
2efdcf0a-6d69-4c33-b430-8d0fb50811f2
|
bwjv72
|
How does your brain determine what to remember and what to forget?
|
I don't think we really know. Last I read we basically think memories are sets of connections between different cells in the brain that need constant maintenance. Imagine something like a book where each word is a cell and the paper (connecting them) rots away if left too long.
They're thought to be stored in catagories (similar memories connected in some way) and we think that if a memory is frequently recalled we do some maintenance on surrounding memories.
If something hasn't been checked out in our mental library for a while most of it has rotted away and it isn't there any more. Bits survive though which is why it is easier to relearn old skills than entirely new ones. Sort of like finding a few pages and once you figure out what's missing it all comes together and makes sense again.
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385243f9-c50d-4985-b0d8-3068b7689fb4
|
bwk2yd
|
Lightning Scarring
|
Lightning, because it is a series of rapid pulses of current, is “high frequency”. High frequency currents travel along the outside of the conductor (in this case, the body of poor dude standing out in the middle of the golf course) in what is known as “skin effect”. So the current travels along the outside of you and branches around, leaving lightning shaped spots on you.
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cbae70d4-2d8c-47cc-a44b-f9fc74bb2d91
|
bwksbc
|
Why is it easy to remember one of someone's mistake than remembering hundreds of good deeds from same person?
|
People are different so there could be many different reasons. It is possible that you are a simply a very unforgiving person, or that the mistake is particularly heinous.
|
71c282f8-0b0f-4f33-b8fb-eb58ad6ba802
|
bwkzdw
|
Why do automatic car windows have to exert so much force that it can break bones or cause serious injuries, at the least?
|
How many times have you seen that happen?
|
f5f046e4-81a5-4777-ae89-2ae5f660ade7
|
bwl2rs
|
Why do cavities hurt?
|
Cavities hurt because the protective layer( enamel ) is damaged causing the nerve to be exposed to decay and bacteria which can cause inflammation.
|
9f7a5bc5-1a20-4a85-a243-ff57dd7b697e
|
bwlcsp
|
How do fingernails and toenails work?
|
No it isn‘t. It‘s like the nail is resting on the skin underneath. And when the nail is growing longer it’s some kind of „gliding“ over it.
Had a work accident back in 2017 where i lost my nail from left middlefinger. So i could see this nail grow back from the scratch.
|
149ef1d5-28bf-4f2d-ad00-641f6899d089
|
bwldpa
|
How are we able to build oil rigs and other infrastructure under the ocean?
|
There are a number of different types of 'oil rigs' in the ocean. In relatively shallow water (less than 200 feet, or so) we can use 'jack up rigs'. These are triangular shaped floating vessels with long legs on the three corners. When the rig is where we want it to be, we jack the legs down to the bottom of the ocean and lift the vessel above the water 25 to 50 feet. We then drill wells from that platform. When we are finished we jack the legs back up, lowering the vessel back to the water where it can be floated to a new location.
Drill ships are ships that have drilling rigs on them. They can work in very deep water. The ship is floated to the location where the wells are to be drilled then anchors are taken out from it in all directions and dropped. The anchor cables are attached to machines that pull or slack the cables as necessary to keep the ship in one place, even in high winds or heavy seas (big waves). This is called dynamically positioning.
Some wells are drilled from platforms that are giant structures that are floated out to the spot where the wells are to be drilled and then stood up and anchored to the sea floor. These can be as tall or taller than the largest buildings on earth.
There are other methods that are a hybrid of these or similar in some ways. All of them are very expensive and require lots of engineering.
|
765203cb-a4d5-409e-95fd-a6c7cd0bd370
|
bwlqwc
|
Why do so many low-quality youtube videos loop over from the beginning midway through the video?
|
To pad the runtime and try to make more revenue. Longer videos = more money. 10 min YouTube videos make the most per ad click for the time they are. Short videos don’t make as much.
Longer videos make more money than shorter videos, given they have the same number of subscribers and views.
Solved!
|
b923e96b-abb1-4cae-8430-548b3abf0ea6
|
bwltei
|
How does telephones actually work? How can someone in other part of the world hear my voice or sounds through the telephone with almost no delay?
|
The telephone networks are a lot like the internet in most ways. When you dial a phone number the phone tries to connect to the phone at that number, your phone company works out if you are allowed to make that call or not, and then your phone breaks your voice down into little digital packets and sends them to the destination.
To get to the destination, the packet has the source number (your phone) and the destination number (who you are calling) and gets sent to the first hop (the phone exchange). Based on the destination the exchange then works out which is the next exchange that it knows about that is closest to the destination number and sends it on. That exchange then either sends it on to a closer exchange, or if it is the closest one sends it to the destination phone.
The other phone then takes those packets and turns them back into sound and does the same with the voice of the other person.
|
6300f2a1-3b0f-45f2-a15a-d87016aec842
|
bwlued
|
If a gigantic tsunami is coming at you, why can't you just dive into it like a normal wave and swim to the top?
|
If you see video of the Tsunami that hit Phuket , Thailand you’ll notice that it wasn’t even a wave that “hit” land just a torrent of rushing water, like a huge river just showing up and washing everything away.
|
0987d855-5722-4080-ad6e-cb212936c582
|
bwlwqg
|
How did they record music before computers?
|
The earliest recordings were purely mechanical - sound converted to a vibrating needle the scratched waves on a waxed cylinder. Playback is the reverse, the needle follows the tracks and is converted back to sound through a "horn".
Then it changed to magnetic tape recordings. Where sound is converted to a changing magnetic field that "imprinted" itself on magnetic media (usually tape). Playback is the reverse, you have a pickup that could detect the magnetic fields on the moving tape and converted and amplified it to electrical speakers to produce sound.
Most music was distributed as vinyl records which is still a mechanical recording (the grooves held the record of the sound wave). The needle vibrates according to the grooves and converts it to an electrical signal which is then amplified.
Then came cassettes/8 tracks etc which are magnetic media (basically a cheaper and smaller version of the studio master magnetic tapes).
After that came digital/optical in the form of CDs. At this point you can pretty much say it is a "specialized" computer designed specifically to convert the light impulses from a laser that "reads" the recording on the CD into a series of 0's and 1's which is converted into numbers that specify how "loud" the sound is at a small instant of time, then strings this all together to form a sound "wave"
Then with computer storage becoming cheaper, general purpose computers becoming more powerful and encoding algorithms becoming better, the sound is converted in a compressed (smaller) series of 0's and 1's and stored in memory/hard disks/SSD as a file - which is pretty much what is used today. (mp3)
With the internet becoming so much faster, it became possible to "live stream" sound data from the internet rather than store the sound/music files on your local computer. Today, the internet is so fast that you can do this with video too.
|
7cc4c1ef-de19-476c-9402-2890ff4e1b97
|
bwm42k
|
Why do you get hangover?
|
Ethanol is essentially a poison that we can tolerate up to a certain amount. Ethanol particles are really small and when they pass through our brain cells, it interferes with their ability to talk to each other. Ethanol is also diuretic, meaning it makes us pee more (just like coffee) which causes dehydration.
So, it's mainly the dehydration that causes the headache that comes with a hangover. Other than that, your body is trying to break down and expel the poison.
|
51b4b468-b5c5-4543-97d1-1438b10a52a6
|
bwmct3
|
"Too much oxygen things go boom" It means Oxygen can be used as fuel like a gas stove, or lighters, or that some mundane things like clothes/footwear can ignite from friction in a concentrated oxygen room?
|
Too much oxygen means that things we don't normally think of as explosive or even flammable, things like metal, can burn or explode.
Stuff burns because it combines with oxygen. Normally, air is only 20% oxygen, and the more oxygen you provide, the easier and faster it burns.
If you use pure oxygen at high pressure, heavy oils that normally needs a flame to ignite and burn calmly, explode with only a little friction. Steel or brass, which we don't think as flammable, ignites with only gentle heating.
And soaking something flammable in liquid oxygen turns it into an explosive. There is plenty of oxygen, and it is in close contact with the fuel - provide a source of ignition and the two will combine rapidly.
|
e22fc72b-6e46-4ef0-a0da-baaf42349750
|
bwmizs
|
planes normally charge some money if your check-in luggage is over weight, why do they charge extra even if my luggage is 26kg(let's say allowed is 23) and my gf has a 17 kg check in. Our combined is under 46 but it's still charged. is it just a scam to earn more money?
|
Some airlines do allow a combined figure. Usually because angry customers will just open both cases and move stuff over. I think it depends on how much of a scumbag the company is. I would expect Ryanair to charge you.
|
b974ace8-6608-4dd4-b2d3-b40ec48d60df
|
bwmv6x
|
How does Tesla Autopilot work?
|
You can look at Tesla’s autopilot in two ways: highway autopilot and full autopilot.
Currently, Tesla’s use sensors and cameras to read the lines on the road, knowing how to stay in lane without the driver touching the wheel.
The next step, and the largest breakthrough in driving, will be full autopilot. Using cameras and computers to see a stop sign up ahead and the computer knows to stop there. Or seeing green in the stop light and knowing it’s safe to keep driving. This is done by thousands of Tesla’s on the road today gathering data and the machine computer constantly learning “oh okay so that’s a stop sign. That’s a yield sign. That’s a yellow light.” Then applying what to do when your car sees it.
|
38aad8e3-84ad-4c61-91bd-02e3f698f482
|
bwmvdx
|
If most bodies of water are filthy with poor visibility under just a few feet, how are fish and sealife able to see where they are going and what they are doing?
|
Fish can detect movement with their lateral line. Also Fish dont have human eyes, they evolved to see whats important and in different conditions.
|
ca0fb9d2-9292-41cf-9c68-1aafbda5dc6c
|
bwn1s6
|
How is blurring added to photos and videos and how can be removed?
|
Natural blurring in photos and videos is from the focal point and depth of field. This cannot be removed. Blurring by software can be altered but will be different in case by case scenarios.
|
381a033d-6c83-4c74-b7ba-62bd418eee92
|
bwn5iv
|
Why is it hard to breathe after overeating?
|
When you breathe in diaphragm moves down to abdominal cavity, leaving more space for lungs to expand above diaphragm. When there's a stuffed stomach taking up space in the abdominal cavity that's harder to do.
|
706f7d6a-d2a9-4a60-9f75-db1ac78c788f
|
bwn7eq
|
Why is Australian wildlife so much more intense/dangerous than the rest of the world?
|
In Australia, an average of about 3 people per year dies from all the different animals you'd expect in a typical "deadly animals" documentary combined. Mostly great white shark attacks which exist across the globe. If you're looking for species that are Australian only, it is less than 1 death per year.
& #x200B;
Dangerous animals are interesting - they are spoken about more than your average duck so the consensus becomes that there are dangerous animals killing things all over Australia because they're spoken about and broadcast more. Look at the Momo hoax...one day it was all over the news and it was a 'massive epidemic' and parents were boycotting youtube for their kids. Those of us that aren't blinded by media frenzies saw it for what it was - massively blown out of proportion and inciting outright false information about it. Same with deadly animals in Australia, sure they exist but it's not as intense as you would believe.
|
e45a1b78-f4d4-4fd7-b290-e5523105ad32
|
bwnbcl
|
What makes a continental breakfast, “continental”?
|
It's a British term where the "traditional" English fried breakfast is large with eggs, bacon,fried bread, fried tomato, and a few other things. The "continental" breakfast is traditionally served cross the channel (I.e. on "the continent") which is a smaller fare just to get you going. This is something like coffee/hot chocolate, croissant/toast, etc.
The true European continental breakfasts I experienced may also include sliced meat or cheese. But it's a lot smaller that the bigger breakfasts we tend to have in North America.
|
2ba817d6-7b94-49b9-b7db-0f8ed0c14813
|
bwng9r
|
Why can some pain be mitigated through pressure?
|
The gate control theory of pain. If you overstimulate certain nerve fibres, for example by rubbing a wound, it will overwhelm the pain stimulus that is entering the spinal cord at the same level and block it.
|
e490efd0-d6c8-4992-83ea-a47c1d792a3a
|
bwnjhi
|
When to address and not address someone Sir or Madam?
|
You all are missing the fundamental regional distinction.
In the South, sir and ma'am are polite terms of address that are used with both people you know and people you don't know. So you can say "yes, sir" or "yes, ma'am" to your teacher, your coach, your parent, as well as the stranger.
In the North, however, sir and ma'am is a polite term of address that is used for people that you don't know, and you have no intention of having any relationship beyond the immediate transaction. So "excuse me, sir, may I have the check?" said to the waiter, "excuse me, ma'am, but I was here first" said to the person who butts in line, "excuse me, sir, how do I get to 123 Main Street" said to the passerby, and "sir, your car is ready" said by the mechanic to the client are all appropriate, because these are distant, transactional relationships. But sitting in a business meeting with your client Bob and calling him "sir" would be inappropriate, because you KNOW Bob. Just like saying "yes, sir" to your father would be inappropriate, because he's your FATHER, not some stranger on the street whose attention you are trying to get.
|
cee49248-1932-4e75-83ad-a8d4209b5b46
|
bwnjps
|
nightmares? Why would your brain scare you?
|
Dreams and the process of dreaming and even why we dream in general is poorly understood, but what you dream about isn't really intentional. Your brain isn't necessarily "trying" to do anything in the sense that the content of the dream isn't intentional. A nightmare isn't necessarily your brain trying to scare you any more than a dream where you bake a cake is your brain telling you that you should bake a cake.
The most widely accepted theories are that dreams are how we consolidate and make sense of memories and possibly emotions as well, essentially "decluttering" your conscious and subconscious mind. So in that regard, dreams are kind of just random detritus from your day floating around in your mind that your brain is processing. It's also Things you thought about, things you learned, things you saw and heard, things you felt..etc. Your brain takes all of that and sorts it while you sleep. It's also widely thought that dreams can serve as a tool for working out solutions to actual problems or even hypothetical scenarios.
& #x200B;
edit for clarity.
|
32d981b4-adad-480d-84a3-4f14ef6c9012
|
bwnx8c
|
How are we able to know other animals spectral sensitivities?
|
The cone cells in an animal's retina have pigments in them which absorb light which the cone then detects. It is possible to measure the spectral absorption of these pigments, which gives a good idea of what the animal can sense.
|
ff56313f-a2cb-4400-bcdd-d71680472ca3
|
bwo9f8
|
How exactly does our brain "direct" blood to a specific body part, e.g. for an erection?
|
Your circulatory system is just an interconnected series of pipes that goes around your body starting and ending at your heart. Like water pipes, you can increase or decrease the flow of these pipes. Your body directs flow by releasing certain signalling chemicals into the blood which makes the vessels (pipes) either expand/dilate/widen (vasodilation) or contract/constrict (vasoconstriction) to allow more or less blood through. Some of these act locally in a certain area, while others will act in a broad region of the body.
A penis is like a bouncing castle. Blood, or air is pumped in and blood, or air will passively leak out. During an erection, your body will increase the amount of blood going in by making the vessels expand in diameter. This means more blood goes in, while the same amount is going out. The net effect is a bouncier castle, or an erection.
|
6a0a2c12-4b80-4fd2-bb61-edd0ae611066
|
bwoi65
|
Why do movements in video games look so overly "smooth"?
|
Former game dev here,
& #x200B;
There is actually a really big problem: the uncanny valley. In aesthetics, this refers to the degree of an object's resemblance to human appearance and your emotional response to it. In short, the closer we get to making something human, the more your mind and emotional response is aware that it's not real, and you have an adverse reaction.
& #x200B;
It's creepy as shit. Like touched by your uncle, who's made of spiders creepy.
& #x200B;
You have to actually get it flawlessly perfect, or it's wrong. So it's easier to stop at 80-90% there rather then go up to 98-99%. Your mind knows that these images aren't real, and so it stops the uncanny valley.
& #x200B;
And in in video games, they're not aiming for realism anyway.
|
7ce2d8f3-d839-41ef-8961-b8435e968f86
|
bwoog2
|
Why do so many otherwise great TV shows struggle to end their stories well? What is it about the creative/production process that makes this so difficult?
|
Simply put, it's easier to tell a 2 hour story than what amounts to an 80 hour story. With a 2 hour movie you spent 20 minutes introducing your characters, build your story a little and then spend 20 minutes ending it. If you've got 65 hours story building, it would feel very cheap to spend 20 minutes on ending it.
In modern times the internet also plays a factor here. With fan communities theorizing your possible endings, a lot of writers feel an obligation to avoid ending things the way fans expect, so if the obvious ending is the best ending, it may not get used.
|
459a5e2a-8226-4733-95fe-de2b77901ee4
|
bwope3
|
How can two people in the same environment feel completely different temperatures?
|
Because you produce different amounts of heat. Your body doesn't actually feel temperature, it feels the rate at which it is losing heat. If you aren't losing heat fast enough then you feel hot, if you are losing it too fast then you feel cold.
Tons of different factors into heat loss like insulation and metabolism, but thats the gist of it.
|
f15ce222-f02a-4a73-ab78-85ae8d4e7ce8
|
bwp0ji
|
How do we know what the random digits of Pi are? How do we know it's infinite?
|
We have figured out that pi is equal to certain kinds of equations. For example:
1/1^(2) \+ 1/2^(2) \+ 1/3^(2) \+ ... = π^(2)/6
The more terms you compute for the left-hand side of that equation, the more accurate a representation of π you can create. In reality we use more efficient algorithms, but they are a bit more complicated and difficult to explain. The point is, finding digits of π is a simple matter of calculating additional terms of these kinds of algorithms.
We know π has an infinite number of non-repeating digits because π was proven to be irrational in 1760. If the digits of π repeated or terminated (were not infinite) then π would be rational and could be represented as a fraction (with integers in the numerator and denominator). It has been proven that if this were the case, then it would result in a mathematical contradiction. Since contradictions can't exist, we have to rule out the case that π can be represented by such a fraction, and therefore isn't rational.
|
6e136490-576c-40e0-8dd3-5e5e0cb931aa
|
bwp42i
|
What is a Bank-sovereign doom loop?
|
Governments in the EU are giving banks very low interest rate loans to stimulate spending in the EU. Except these EU governments are getting the money to make these loans by borrowing it back from those banks at interest rates above what the governments are the charging banks.
Imagine I loan you a 10 dollar bill, and you promise to pay me back $11. Except after I make the loan I realize that I couldn't really afford to loan you that money. So I borrow the $10 bill back from you, except that I promise to pay you $12. All we have accomplished by doing these transactions it to create a world in which I owe you $1 for no reason.
Because neither you nor I has actually spent the $10 bill, we can keep doing this over and over again until there is billions of dollars in debt, with me owing you *substantially* more money than you owe me back. This is whats going on in the EU right now.
This is creating a cycle in which absolutely nothing productive is being accomplished at the same time that EU governments are heavily indebting themselves to banks in a manner that appears to be unsustainable.
|
5cc4e7d4-c1f6-491d-a602-351ca46922d2
|
bwpgva
|
Why are birth control methods only 99% effective at most?
|
Operator error, manufacturing defect, and plain ol' smarter-than-your-average-sperm make sure that no non-permanent surgical method is truly 100% ironclad effective. Even if it was that good during internal tests, the manufacturer wouldn't make the claim for legal reasons.
The only proven 100% effective form of birth control is to reference Reddit memes on your first date.
|
78a665c0-fce0-4062-92d8-55db20427216
|
bwppjz
|
Why do birds fly so low to the ground when crossing roads? Whenever I’m driving they fly right in front of my car when they could fly at any other height?
|
I heard about a study that looked at Cliff Swallows, who used to be fairly rare, but was growing in population as we started building highways in their habitat (1983-2012). They relied on cliffs for nesting sites, but readily adopted to using overpasses instead.
An ornithologist studying them over a few decades started compared the wingspans and found that the wingspan of these birds was shortening. This gave them increased agility at the expense of range. This makes sense, since their nesting sites were much less rare, but you needed to be able to dodge traffic.
Birds have literally evolved in the last century to be able to bob in and out of traffic. This gives them an unnaturally protected habitat and access to the bounty of food source (roads create an "edge", like you'd normally find in a clearing in the wood, where insects and quick growing plants flourish).
[_URL_0_](_URL_0_)
I'm sure that this extends beyond just wingspan but also reaction time. If you've ever seen a bird drop out of the sky onto a pile of seeds, you know they have incredible reaction times to begin with. They may seem close to your car to you - but I imagine they have a faster reaction time than you, and they get a bit more of a heads up, as they are probably very sensitive to changes in air current caused by your car (which also give added energy to move them out of the way).
|
18cc2f44-0166-454e-9816-208bd01facd3
|
bwpr30
|
how do Android phones get slower over the years?
|
The phone do not get slower but is is the software that is updated and newer version in general have more feature and require higher performance/memory on the phone. New software and OS is designed to use
You often add more and more software where som it it run in the background so the phone have more to do more. So use a some app to see what program is active in the background and uninstall them if you no longer use them or just disable them in the apps settings. This can have a hug effect as you free up both memory and cpu usage.
Other reason is that your baseline of speed is different and you might compare to other faster phones.
If the storage on the phone is full it might preformae slower so remove apps you do not use and put photos, videos etc on a computer and in the cloud.
If you did a factory restore to the original software it would be as fast as when it was new but slow down when the software was updated.
& #x200B;
The thing that age in a phone is the battery and the capacity and max current drop over time.
So it might be the case that the the phone cant run the CPU at as high frequency with a old battery especially if it is not fully charged. Apple have done it because som old phones they could shut down when the battery was at 40% but with the change the could use all power in the battery but at lower speed. It might be the case that some android phones does that do
So old bad batteries might reduce the performance on a phone but I am not sure that any Android phone does that. It is the only change that would not fixed by a software.
|
48848a6e-7500-4cb2-ac9c-2bb201946278
|
bwpun8
|
How are nuclear cores, such as the ones used in reactors, created safely?
|
Most nuclear fuel is made of U238 and U235, both of those are not that radioactive. U238 have an half life of 4.5 billion years and U235 of 700 million years. They decay but really slowly. They also decay in alpha particle, which is basically an helium nucleus, that will be stop by your skin. So you could hold it in your hand and never have any problems. That said Uranium is toxic so you don't want to ingest it and have glove while manipulating it is a good idea. To both protect you, but mostly to protect the Uranium, you don't want the oil of your hand to end up in the reactor.
& #x200B;
In the reactor fission will occur and so the U235 will spit and emit much more powerful radiation and create new elements that are a lot more radioactive, meaning they decay a lot faster than U238 or U235 making them more dangerous. In addition, in a reactor there is neutrons flying around and if they hit and are absorbed by an atom, this can transform that atom into a radioactive one.
& #x200B;
The problem with Chernobyl is that the explosion spread the radioactive into a dust that was in the air and spread around large area so anyone working there was expose to highly radioactive dust that they would not only be near, but touch and even inhale. Over time the radioactivity decrease, the shorter the half life the stronger the radiation is (more dangerous), but the shorter time it will need to decay completely.
|
c9900836-ffb5-4fd5-b6a5-3703ecf84f95
|
bwq76b
|
2hy is it hard to swallow with an open mouth?
|
Having your jaw open hinges back and pushes against your esophagus thus restricting flow of foodn
|
78fb5333-bf55-4966-8d7e-dcd59ec4fd36
|
bwqroe
|
How to people that karate chop or punch a cement block not break their hand?
|
It's a trick, the blocks are not very strong, and they are being punched or kicked in their weakest points, while also leveraged over air or a block that wedged to cut through.
It looks impressive, and that's the point.
|
38dc98e4-ab81-4924-8407-a95f6e7e8efd
|
bwr363
|
why is some water reflective (I. E. Water mirrors) and other transparent (I. E. Bottled water)
|
From air into water, it's a function of lighting. Water surfaces reflect some of the light that hits them from air. If the alternative is otherwise dark, like a water mirror, then you can see this reflection. This is how "one-way glass" works. If there is light coming through the water, like a bottle, the reflection is present but not bright enough to see.
From water into air, it's all about the angle. At steep angles, water is clear. At shallow angles, water is reflective. At 41˚ from "vertical" water to air is completely reflective.
|
6e973d67-6401-4c7d-bc3b-c2b49385bbbf
|
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