Recent comments in /f/explainlikeimfive
newytag t1_iy1ljl1 wrote
Reply to ELI5 why do you need to turn of hard drives to unplug them instead of just unplugging them by Devil_kin1
You don't need to turn off a hard drive to unplug them. The act of unplugging the drive is what turns it off (one of the plugs is for power). Drives can otherwise really only be turned off by the OS's power management plan, but that isn't a pre-requisite for disconnecting it.
That said: any storage media you wish to disconnect while the system is on, you should ensure it not have any pending writes or is not actively being written to. If you disconnect a storage medium while it's in use, you could corrupt its data. Windows has an "eject storage device" feature for external storage devices for exactly this purpose. For internal drives, generally they shouldn't be disconnected while the system is on, even if it's not a problem electrically^([1]); unless the system is specifically designed for it^([2]).
[1] Eg. SATA is hot-pluggable - it can be safely (dis)connected while the system is powered
[2] Eg. servers which can remain operational while dead drives are replaced
303elliott t1_iy1kkg3 wrote
Reply to comment by peenutbuttherNjelly in ELI5 If fevers are the body’s defense against viruses, and the body’s top most interest is the preservation of life, then why does the body allow fever temperature to get life threatening high (104+)? by TheFaytalist
You say we don't have any control over it, and then follow that up by saying we've intervened to an unimaginable degree lol. What I'm saying is people will not naturally evolve a fever limiter, because death by fever is prevented with modern medicine. There's no evolutionary incentive for it, so if it happens, it's just a mutation that's not selected out. Therefore it's unlikely to be widespread.
mikeoxlongsr t1_iy1jmyr wrote
Reply to comment by K3piper in eli5: Different body hairs grows differently by kenito225
>learned from a barber that hair has a ‘terminal length'
Dont know how much of this is accurate but when l misspelled harebrained (foolish) to "hair brained" I found this interesting talk:
Your hair when it grows at full length gets phosphorus, calcium and vitamin D, making memory more efficient and gives you physical strength and better stamina.
[deleted] t1_iy1jmxv wrote
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Czl2 t1_iy1jgw1 wrote
Reply to comment by pdpi in ELI5: Why does it seem to be harder for women to control their bladders? by RandomKidIsMe
> culture and societal norms play a massive role in moulding behaviour, and completely drown out the biological differences.
See:
Do you disbelieve these statistics?
Could this be "Objective Example #3" that it is NOT true that "culture and societal norms play a massive role in moulding behaviour, and completely drown out the biological differences"?
Replace your word completely with say 50-60% and we would be closer to agreement about the situation today.
What about the future?
Men and women continue to gain ever greater control over their bodies via technology. We already see the impact birth control technology has. Now imagine technology to control your own "dimorphic temperament" (ie behavioral differences between men and women) or technology to genuinely change your sex or even migrate between bodies as you might switch cars today.
In such a future clearly "culture and societal norms play a massive role in moulding behaviour" because the "biological differences" that exist today will start to cease to exist. I think few can imagine how interesting that future might be much like African nomads from thousands of years ago could not imagine our reality today.
Dovaldo83 t1_iy1ifv7 wrote
The hairs on your eyebrows don't stop growing. They're always growing. It's just that the tips of them eventually wear out and break off so they never get longer than a certain length.
The different hairs on your body grow at different speed and have different durability. How long they can get before the tips to break off varies by location
Aneverydayuser t1_iy1hskf wrote
all cells are differentiated from the same genetic information. Your hair follicles are differentiated in the same way that your eyeballs are different from skin cells. Same genetic information, different expression.
As to why public hair is coarse, I beleive its because it reduces friction better and is more resilient to tangling. Pretty important to avoid infections and injuries.
peenutbuttherNjelly t1_iy1hgi6 wrote
Reply to comment by 303elliott in ELI5 If fevers are the body’s defense against viruses, and the body’s top most interest is the preservation of life, then why does the body allow fever temperature to get life threatening high (104+)? by TheFaytalist
I understand where you're coming from, but evolution is not something we have any control over. Natural selection is always at play. Just that we've intervened to an unimaginable degree that we cannot predict the direction of selection anymore. It's also not a single direction but multiple directions now. Agreed! Getting laid needs to out-select not getting laid cause our very survival's at stake.
K3piper t1_iy1hen5 wrote
Edited for spelling. I have a lengthy beard and learned from a barber that hair has a ‘terminal length,’ that is, a length that it will grow out to and stop. I imagine hairs from different regions of the body have different terminal lengths but I’m speculating.
This conversation arose when I remarked that beard competitions are silly because they are merely “I avoided shaving the longest” contests. That’s when I learned not everyone could grow really long hair if they just stopped cutting it.
This is weird, right? Like the hair knows when to stop and to re-grow when cut back. 🤯
[deleted] t1_iy1hd7z wrote
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[deleted] t1_iy1g6wb wrote
Reply to comment by maricute in ELI5: If allergies, and especially anaphylaxis, are so common, why do we still need prescriptions for epi pens and such? by boomokasharoomo
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303elliott t1_iy1g6b0 wrote
Reply to comment by peenutbuttherNjelly in ELI5 If fevers are the body’s defense against viruses, and the body’s top most interest is the preservation of life, then why does the body allow fever temperature to get life threatening high (104+)? by TheFaytalist
I love your enthusiasm, but you seem a bit misguided. Evolution has essentially stopped for humans, as natural selection no longer determines our survival. If anything, more evolved humans will be those that are better at getting laid with modern technology.
peenutbuttherNjelly t1_iy1fijw wrote
Reply to comment by 303elliott in ELI5 If fevers are the body’s defense against viruses, and the body’s top most interest is the preservation of life, then why does the body allow fever temperature to get life threatening high (104+)? by TheFaytalist
This! And the fact that everything we've evolved to feel n experience is a result of millions of years of evolution. Not that it's perfect. Just that it's been a few million years. Billions more years of evolution and we shld be able to figure out human deceit from truth, cool off instantly after getting angry (selecting for the ones that cool down quicker). For now, the temperature rising beyond and staying on longer is the result of an evolution that has served us well. Once too many of us experience negative outcomes off of it, nature would begin selecting for those that eventually get cooler cause the meds kick in and the body can just chill from then on.
[deleted] t1_iy1evse wrote
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VulcanVisions t1_iy1erh8 wrote
Reply to ELI5 : How do electric shocks kill you? by EaAeEaAe10
Your heart has a little part called the AVN which generates it own electric current, which causes the heart muscles to contract in a regular pattern.
An electric shock overwhelms the AVN, causes a kind of shot circuit effect where it overloads, and the heart loses its rhythm, killing you.
VulcanVisions t1_iy1df9h wrote
Because the lower down the food chain you go, the more calories energy a food contains.
So imagine a simple food chain: Sun > Grass > Buffalo > Bear.
To make 1kg of Buffalo, you need 10kg of grass.
To make 1kg of bear, you need 10kg of Buffalo.
The bear needs the caloric equivalent of 100kg of grass, whereas the buffalo requires only 10kg because it eats the plant directly.
From a calorie/energy point of view, the further up the food chain you go, the more energy is lost at each stage and the harder it becomes to get enough energy, which reduces your potential to grow your population.
This is why there will always be significantly more buffalo than bears.
In terms of efficient calories, it is best to be a plant and take your energy directly from the sun.
But since animals cannot do that, being a herbivore is the next most efficient way, with the minimum possible energy lost.
readitreaddit t1_iy1dacl wrote
Reply to comment by RandomPosterHey in ELI5: How does buffalos get so big while being herbivores? by Kay1636
Is that why cow poop is gooey and not like... Well, like a banana shape?
VulcanVisions t1_iy1cv0b wrote
Digestion requires huge energy.
It is diverted away from all other bodily systems, making us feel sleepy.
RandomPosterHey t1_iy1cpri wrote
Reply to comment by readitreaddit in ELI5: How does buffalos get so big while being herbivores? by Kay1636
The fiber in our diets he refers to is the fiber from fruits and vegetables that we cannot digest. I imagine if we could digest the grass it wouldn’t count towards the fiber that aids in passing matter through the digestive tract as it would have been digested already
MotsPassant t1_iy1ajta wrote
Reply to comment by Vilsue in Eli5: How do companies predict if gas will go up tomorrow? by robric18
I don't think that answers the question
4510 t1_iy18mti wrote
Gasoline that you put in your car is refined (heavily processed) from crude oil. At any given point in time you can observe the price of oil as an input into the refinement of gasoline but what can sometimes take time to work it's way through to the end price of gasoline is the amount of refining capacity available. When refiners are working all out to produce enough supply to meet demand, they generally move the selling price of gasoline higher as demand is very strong and so a price increase will not impact their ability to sell volume (and vice-versa when they have a lot of excess capacity). The difference between where refined gasoline is sold relative to the crude oil input cost is referred to as the "crack spread". Thus if oil prices move higher today and crack spreads are high, it is likely that gasoline prices are going to move higher in the near term.
readitreaddit t1_iy18i9z wrote
Reply to comment by EpiHackr in ELI5: How does buffalos get so big while being herbivores? by Kay1636
Why would we not have fiber?
readitreaddit t1_iy18cm0 wrote
Reply to comment by duranbing in ELI5: How does buffalos get so big while being herbivores? by Kay1636
Thank you this is nice.
bugi_ t1_iy1810f wrote
Reply to comment by Interesting-Peak1994 in ELI5: How does buffalos get so big while being herbivores? by Kay1636
Have you ever been outside?
gazdxxx t1_iy1ljq0 wrote
Reply to comment by BlowjobPete in ELI5: Why is it bad to turn off your computer by the button, if windows goes through the shutdown process anyway? by tjiosse
You don't take it seriously until it happens to you. I've had filesystem corruption happen recently on a Linux machine when it crashed in the middle of writing to the X11 lockfile. This caused my graphical interface to completely stop working. It's less common with modern filesystems but it can still happen.