Recent comments in /f/explainlikeimfive
existentialstix t1_j2cpk4l wrote
Reply to ELI5: How do services like YouTube simulatenously stream to thousands of users? by NativeSonSF
Yes a single server can usually server multiple users.
When a video is uploaded, it will usually be saved to one of the machines in the uploaded region. The same machine can now serve many many users. This number will depend on several factors like CPU, RAM, SSD, network bandwidth of the machine…
Such servers can now be distributed across the world and hold a copy of it. This helps reduce buffering on the user side as they will be most likely served by a server in a region closest to them. Ex - server in Oregon handles traffic for folks in the west coast of USA, a server in Dublin Ireland will serve users in Western Europe and so on….
(Algorithms to determine how/when this is needs to copied over)
Depending on the demand in each region can now scale up to the more servers to serve the traffic needs in that region.
(Again determined algorithmically)
cbeck23 t1_j2cpie2 wrote
Reply to comment by krammark12 in ELI5: Why does putting one foot out from under the blankets bring so much relief of heat while laying in bed? by SirDuke6
Correct. That is why when it is hot , I put rubbing alcohol on the tops of my feet, sides of my neck, and back/inside of my knees
akayataya t1_j2cphp9 wrote
We haven't. We cannot point to anywhere in the physical brain where we can say, "There! That's it! That's the mind."
In fact it's backwards. We have to have our mind to be able to see a brain. That is self-evident and objective (you cannot observe a physical brain if you don't have a mind).
Personality, sensory perception, and things of that nature are absolutely affected by neurological processes, but we aren't really able to get outside of a mind to see if a brain can still be observed without one.
constantino675 t1_j2cpfp7 wrote
Reply to comment by Professional-Ad3441 in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
think of waves in a bathtub or pool, or even an ocean. the waves are highly complex, and you may not be able to cancel them all perfectly, but if you can just knock down the peaks and troughs, you'll make things much smoother.
Throw in some white noise and you can drown out the rest.
frustrated_staff t1_j2cp8w6 wrote
Reply to comment by T-T-N in eli5 how names work in the world by Nakakapag_pabagabag
Yup. I mean, it could happen. iIRC, daughters take the mothers' name, but it's been awhile since I checked the details...
blipsman t1_j2cp8mv wrote
Reply to ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
There is no money that goes anywhere.
Imagine you have a rare comic book and I tell you I’d pay you $100 for it, you turn me down. A week later, you need money to buy your mom a birthday present and ask if I want to buy it. But now, I only offer you $80 and you begrudgingly take it. There is no $20 of yours that went anywhere — I was only willing to pay less for something you have.
Professional-Ad3441 OP t1_j2cp7y4 wrote
Reply to comment by [deleted] in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
watching porn Why is everyone staring at me
azuth89 t1_j2cp7n8 wrote
Reply to comment by ChickenEnthusiast in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
If anything we tend to lose more. They shuffle around on the "richest person" charts while regular folks take a big hit to their 401k. It's all pretend money UNTIL you're an average Joe trying to cash out some stocks to live through retirement. Then that shit gets REAL.
sterexx t1_j2cp5ao wrote
Reply to comment by lucun in ELI5: Why is the recoil of a gun not nearly as bad as getting hit with a bullet while wearing a bullet proof vest if they are both the same force? by Tratakaro
That’s a great detail! I’m going to expand on it in case OP reads here
Gunpowder deflagrates instead of detonating. It burns instead of booms. Well, it does boom from our perspective, but if you watch in slow motion it takes a lot more time than dynamite. This gradually increases the gas pressure to start the bullet moving.
Bullets fit very tightly with the barrel. Imagine a tennis ball stuck tightly into the end of a pipe. You could punch it with all your strength, but it wouldn’t go very far and you’d probably damage yourself, the pipe and the ball. If you start pushing lightly and get it moving and then push harder, you’ll expend the same amount of energy and get it much farther down the pipe without damaging anything.
This is also why some calibers benefit from a longer barrel. If the bullet leaves the barrel before all the powder finishes burning, it will miss out on some velocity. Some calibers are designed to burn quickly so barrels can be short, but they also need to be designed strong to handle the higher peak pressure.
On top of all that, if the gun uses some of that recoil energy to do something useful like load another round, the impulse will be even more spread out on the shooter.
Professional-Ad3441 OP t1_j2cp42s wrote
Reply to comment by Meenjataka02 in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
But there must be multiple noises with different wavelengths? Does it consider them as all sounds mixed into one?
hh26 t1_j2cp2ec wrote
Reply to ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
The valuation is primarily founded on expected future earnings. That is, if people predict that a company will earn lots of money in the future, then its current value right now goes up because people want a share of those future earnings.
Importantly, future money is also a gamble in some ways, because it's uncertain. If a company has a 50% chance of giving $200, but a 50% chance of giving $50 next year, then it's worth an average of $125 next year (risk averse people might discount it further because they don't like risky gambles).
So, if you think a company has the above 50-50 shot, then you would value the company at $125, and buy stock for that much. If you knew for sure it would grow, you'd buy it at $200. If you knew for sure it would shrink, you'd only buy at $50. But if you're unsure then $125 is a reasonable price. If, after buying, more information comes out that it's actually going to be unlucky and be $50, then suddenly the value of your stock will drop from $125 to $50. What happened, where did the value go?
From a certain perspective, it was never there to begin with. In some sense the company was always destined to be worth $50 next year and your valuation of $125 was incorrect based on imperfect information. It was always truly worth $50 and you simply overestimated it.
From this perspective, the investor lost $75, which was gained by whoever sold them the overpriced stock, because they sold stock which was truly worth $50 for the price of $125, and got out of the market before the truth was discovered.
From another perspective, maybe the company truly has a real possibility of being worth $50 or $200, and even though your information is imperfect, it's not random, it's based on decisions made by the company and the economy overall. There is a possible future in which it is worth $200 next year because it genuinely produces and sells $200 worth of goods, and another future in which it makes poor decisions and only produces and sells $50 worth of goods. If the government makes some sort of regulation that cripples the business, or the CEO botches a decision, or some competitor springs up and outcompetes them, then they lose the lucrative future and gain the poor future. From this perspective then, potential value is being destroyed in the future. That is, they had $200 worth of opportunity and they lost it. Value that people thought would be created was not. If somebody creates a virus that will inevitably kill all the corn plants five months from now, the valuation of farms will plummet in anticipation of the lost value that was supposed to be created but will instead be destroyed, despite the fact that it hasn't physically been destroyed yet.
Tech is a growing industry. People expect it to make even more money in the future than it is now, and anything that changes those expectations will change current valuations immediately, because people are planning for the future and pricing it into their investments ahead of time. Investors lost $400 billion of potential value because we used to think the stuff they had was going to be super valuable and now we think it will be only somewhat valuable.
[deleted] t1_j2cor0w wrote
Meenjataka02 t1_j2coo36 wrote
Reply to Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
If you imagine sound as an airwave when it picks up sound that it isn’t making it immediately plays an opposite airwave (sound) that cancels out the two sounds in your ear
Sparquee t1_j2coklw wrote
Reply to Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
The speaker sends out a tone at a very high frequency. That frequency is particular that it actually interrupts noise outside. Think of if you run your ear aggressively as if you're itchy, you might get a high eering tone afterwards. You may also have noticed you don't hear anything for a few seconds. That's the whole concept of noise cancellation.
Hope this helps.
DragonFireCK t1_j2cokc2 wrote
Reply to comment by Fuzzyphilosopher in ELI5: why gas fireplaces have long orange flames while gas stoves have very short blue flames. by brownlawn
A fireplace is heavily a décor element, and thus intended to look pretty, even at the expense of efficiency. Some gas and electric ones will even have speakers built-in to provide the sound of burning wood. Typically, you can adjust the mixture in a gas fireplace to be more efficient, though doing so will sacrifice much of the décor element.
You can also get gas space heaters, which are intended to produce heat without looking pretty, and will generally be adjusted for a high efficiency burn.
Skusci t1_j2cojr9 wrote
Reply to comment by adept-grumblefish28 in ELI5: Why can't cell phones come standard with a thermometer? by [deleted]
Your Garmin probably tends to run a decent bit cooler than a cell phone. Or like at least a modern smartphone running a game. I've had my phone gets pretty dang hot before.
Though I'm also pretty sure if a phone MFG wanted to they could figure out how to make an ambient sensor work with reasonable accuracy. Probably just not worth it though
[deleted] t1_j2cojft wrote
frodeem t1_j2coh3s wrote
Economy of scale. Let's say I make and sell bottled tea. I need a factory, machinery, labor, and raw materials. Factory rent, and machinery are both good for 100 million bottles a year. Factory rent is $10,000 a month and buy the machinery for $12,000. These costs are fixed. What that means is I would have to pay that if I make one bottle of tea or a hundred million bottles of tea. Labor and raw materials depend on the number of bottles I make - the more bottles the more tea leaves I buy and the more employees I hire.
Now if I produce only 1 bottle a month I still need to pay the fixed costs and minimum amount for raw materials and labor. So I would price that bottle at $11,000 (factory rent + machine cost per month)+ whatever I paid for labor ($1000), and raw materials ($1,00)+ a little bit of profit($100). So I sell one bottle for $12,200 if I want to stay in business.
If I produce 100,000 bottles the pricing changes. Now my expenses are $11,000 (factory rent + machine cost per month)+ whatever I paid for labor ($25,000), and raw materials ($25,000)+ a little bit of profit. So now my expense per bottle is $0.61. I can add $0.39 as a profit and sell each bottle for $1. My profit would be $39,000.
Hope that explains it.
[deleted] t1_j2cofp2 wrote
Hamjan9000 t1_j2codbb wrote
Well there is a theory that the race of giants want to keep things affordable for themselves, that could be why
Bensemus t1_j2co8yg wrote
Reply to comment by sold_snek in ELI5 why do electric vehicles have one big battery that's hard to replace once it's expired, rather than lots of smaller ones that could be swapped out based on need (to trade off range/power/weight)? by ginonofalg
This is just the difference between dealership repairs and independent garage repairs. Tesla isn’t interested in diving super deep and doing a one off fix. They do high level repairs which cost more.
It also shows that Teslas aren’t locked to Tesla like so many claim. You can bring it to other people to get it fixed.
KoastPhire t1_j2co4ue wrote
Reply to comment by ChickenEnthusiast in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
No we want the mass populace to be richer and billionaires to pay their fair share of taxes.
ChickenEnthusiast OP t1_j2cnxuf wrote
Reply to comment by KoastPhire in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
So do we really want to have billionaires get richer, on paper? Sounds crummy.
ChickenEnthusiast OP t1_j2cnt7c wrote
Reply to comment by Gladianton in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
That's a good phrase to keep in mind, current market value of assets decreasing. Thanks.
atfyfe t1_j2cplyb wrote
Reply to ELI5: How did we realise the mind is in the brain? by theembryo
The mind isn't so much in the brain, the brain is more like a projector. Consciousness is the show, the brain is just the underlying physical machine that's generating it.
But if you break the projector, the show stops.