Recent comments in /f/explainlikeimfive
Full_Temperature_920 t1_j2dg30n wrote
Reply to comment by Gnonthgol in eli5: back then, before astronouts goes to space, how do we know about thing like nonexistent of oxygen & zero gravity? by zetasstra
Wait, so you're saying things in orbit are just endlessly falling? Does that apply to the earth and the sun as well? Is the earth's orbit just the earth falling towards the sun but missing? That's fascinating lol. Oh shit does this mean the moon is always falling towards the earth??
stilsjx t1_j2dg0so wrote
Reply to comment by PuzzleMeDo in ELI5: Why do companies require annual budget be spent 100%? by angrybird7677
What you’re not taking into account is that you also helped with creating the budget, you need to justify the projected expenses. It’s not a punishment to reduce the budget. It’s in everyone’s best interest to run the company more efficiently and profitably. So rather than having frivolous spending at the end of the year, they reduce the budget.
vegivampTheElder t1_j2dg0gu wrote
Reply to ELI5: What makes the rust on a rusty nail different from the rust on shaving razors to where one needs an immediate tetanus shot and the other happens daily by DrySyllabub2563
Nothing, in the sense that if you get hurt from a rusty nail, you should also get checked for tetanus...
p33k4y t1_j2dfxy7 wrote
Reply to comment by Gnonthgol in eli5: back then, before astronouts goes to space, how do we know about thing like nonexistent of oxygen & zero gravity? by zetasstra
>Some almost died from the lack of oxygen and low temperatures
Some did perish, e.g., Joseph Croce-Spinelli and Théodore Sivel in 1875:
https://www.atlasobscura.com/articles/the-balloonists-of-pere-lachaise-cemetery
taylaj t1_j2dfwib wrote
Reply to comment by DavidRFZ in eli5: back then, before astronouts goes to space, how do we know about thing like nonexistent of oxygen & zero gravity? by zetasstra
Negligible weight we could define as weighing <1kg just for an arbitrary definition.
5kyl3r t1_j2dfqxk wrote
Reply to Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
sounds waves go positive and negative. think of a graph of a sine wave (google it to see a visual). half the time, it's above the line (positive), and half the time it's below the line (negative). that represents the waves moving through the air. that's all sound is. like when you push and pull really quickly on a slinky, you can see the waves ripple down the slinky. sound is like that.
sound waves have what's called a phase. remember the positive and negative thing above? if you reversed the positives and negatives, did you know you still get the same sound? the sound will just be out of phase, but to the person listening, there's no difference. a really really good way to actually hear noise cancelling for yourself is to find a living room setup that has big floor standing speakers. listen to a song with a lot of bass. then on ONE speaker, reverse the wires. meaning connect the + to -, and the - to +. listen to the same song. you'll notice all the bass is nearly gone. that's because waves that have the opposite phase cancel each other out.
think of the times the waves is above the line in the graph as +1. at the point it's crossing the line, it's 0. when it's below the line, it's -1. so one single period, meaning one full section of the wave before it starts repeating over and over, would look like this:
..--.._
or by the numbers we mentioned, like this:
0, +1, 0, -1, 0
now the wave with the opposite phase:
.._..--..
and the numbers for it:
0, -1, 0, +1, 0
now what happens if we add the two waves together?
(0+0), (+1-1), (0+0), (-1+1), (0+0)
0, 0, 0, 0, 0
if we graph that, we just get a flat line. the two waves completely cancel each other out.
in electrical terms, the positive and negative is just voltage, and it's very easy to reverse that with electronics. noise cancelling headphones just have microphones at the edges of your headphones, reverse the wave, and add it to the sound you hear. so if you're listening to music, it'll add the reversed phase wave to your music. you don't hear anything because its values exactly cancel out the original sound. also, this only works because electricity travels nearly at the speed of light, and that's way way way way faster than the speed of sound, so even through the microphone and your ear are only an inch or two apart, it has plenty of time to record, reverse, and add the reversed signal to your audio output. it's really neat stuff
[deleted] t1_j2dfp8k wrote
Reply to comment by [deleted] in ELI5: The main difference between Christianism, Judaism, Buddhism and Muslim religions by sp4rkk
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DavidRFZ t1_j2dfnmv wrote
Reply to comment by taylaj in eli5: back then, before astronouts goes to space, how do we know about thing like nonexistent of oxygen & zero gravity? by zetasstra
If we were not orbiting the sun and were directly feeling it’s gravity, it would be about 1600 times weaker the gravity we feel on earth.
I don’t know how weak gravity has to be before you feel “weightless”, though. That’s a good question.
ramblinjd t1_j2dfikw wrote
Reply to comment by taylaj in eli5: back then, before astronouts goes to space, how do we know about thing like nonexistent of oxygen & zero gravity? by zetasstra
Yeah my first thought was Lagrange points are probably the closest thing to what you're describing.
Shauntheredwolf t1_j2dffpp wrote
Reply to ELI5: If I were to eat a thousand Snickers bars, I would put on significantly more weight than if I were to eat a thousand heads of cabbage despite the huge disparity in weight of the pre-consumed food. Where does this mass come from? by marcuschookt
The energy your body doesn't use gets stored as fat. Eating high energy foods results in more more fat.
That fat is stored in fat cells, which also contain a lot of water.
Conversely, the cabbage doesn't have a lot of energy, and most of its mass is water.
PuzzleMeDo t1_j2dfaow wrote
Reply to comment by stilsjx in ELI5: Why do companies require annual budget be spent 100%? by angrybird7677
Depending on why the sink needs repairing, it might cost $50 to repair, or it might cost $100 to repair. If you give me $100, and I repair the sink and return the $50 I didn't spend, and you punish me for this by saying from now on I can never have more than $50 for repairing the sink, you give me a strong incentive to waste money on future jobs instead of returning it.
antilos_weorsick t1_j2df8y6 wrote
Reply to ELI5: What happens with an education system that makes people Capitalize Every Word In The Sentence? Is that some kind of an oversight, or it's just typical for people who speak English as their L2? by shejesa
Your question is a little unclear. What does "what happens with an education system" mean?
I've genuinely never seen this happen, maybe you should ask the people that you've seen doing this. But here's my best guesses:
-
In English, you capitalize letters of "words that carry meaning" (I don't know the correct term, but I mean nouns, verbs, adjectives and such, but not prepositions and such) in a title. For example you would write "The Lord of the Rings". The first "the" is capitalized, because it's the first word of the sentence, and "lord" and "ring" are capitalized because they are nouns.
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In german, all nouns are capitalized, not just the first word in a sentence, so if you saw germans do it, it might be a that.
vavverro t1_j2dexay wrote
Reply to comment by FartyPants69 in ELI5: How did we realise the mind is in the brain? by theembryo
Well, I would argue that possibly at very early age there’s no yet fully formed concept of self consciousness, and by the time it develops, the child is already culturally primed to such an extent that it can’t help but have same mental concepts as all adults.
Its fascinating how sometimes things that we feel to be natural and innate to human nature are actually culture-based. There are societies where they don’t have notions for left and right, they perceive sides of objects and their own bodies in terms of global directions. And stuff like that.
anonymopotamus t1_j2desax wrote
Reply to comment by AllergicToStabWounds in ELI5: How did we realise the mind is in the brain? by theembryo
Ancient Greeks thought that thinking was in the heart, Plato was an early proponent of placing it in the head (in the Timaeus). Before then people in the region would have answered the same way as you, but would have pointed to the heart.
steruY t1_j2densm wrote
Reply to comment by AightlmmaHead0ut in Eli5: Why when you yawn your hearing goes down? by Big_carrot_69
Rule 3443: There is a sub for everything
logicaltuvok t1_j2dektb wrote
Reply to ELI5: If I were to eat a thousand Snickers bars, I would put on significantly more weight than if I were to eat a thousand heads of cabbage despite the huge disparity in weight of the pre-consumed food. Where does this mass come from? by marcuschookt
If I burn 100kg of rocks and 100kg of coal, which one makes you warmer?
RSA0 t1_j2dec5o wrote
Reply to ELI5: How web crawlers and other engines don’t constantly get infected with viruses? by Officialsparxx
No, not really. Modern browsers are pretty resilient, they generally don't trust the code on the page, and limit its possible actions. Loopholes still happen, but they get patched quickly. This is the first line of defense.
Then, they run the crawler code on a restricted user account, so the operating system will refuse any access to system files. That's the second line.
Finally, if the malicious code somehow finds a loophole in a browser, AND THEN a loophole in OS, they get to live - up until the next system wipe.
mixer99 t1_j2de5ud wrote
You answered your own question, so you don't get less next year. It will make more sense if you understand it's not done at the company level, but at an individual department level. If you're the head of the IT department and you have $100k left over at the end of the fiscal year, the CFO might say "IT saved us $100k, maybe next year they can save us $200k!" and cut your budget accordingly. Now next year you have to replace a server, but you don't have the money. You go ask for more money and some of your bosses say "well, the head of IT doesn't manage her money very well, who else we got?"
[deleted] t1_j2de4he wrote
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54yroldHOTMOM t1_j2de3sm wrote
Reply to comment by [deleted] in ELI5: How did we realise the mind is in the brain? by theembryo
But does a processor equal the bios and or it’s OS?
Jkei t1_j2de3c9 wrote
Reply to comment by marcuschookt in ELI5: If I were to eat a thousand Snickers bars, I would put on significantly more weight than if I were to eat a thousand heads of cabbage despite the huge disparity in weight of the pre-consumed food. Where does this mass come from? by marcuschookt
You're asking why some things contain more energy (that you can extract) than others?
Time to look up the Krebs cycle and oxidative phosphorylation. I'm sure they've been explained in detail on this sub before, and good old wikipedia will probably do a decent job of it too.
laser50 t1_j2de1se wrote
Do we really though? Most people still think that's our soul and it is in our body.
[deleted] t1_j2ddzdu wrote
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ivthreadp110 t1_j2dg3re wrote
Reply to ELI5: What makes the rust on a rusty nail different from the rust on shaving razors to where one needs an immediate tetanus shot and the other happens daily by DrySyllabub2563
Tetanus is not caused by rust, it just makes a nice environment for the bacteria to live. It usually comes from agricultural runoff. So the rust on a rusty nail is more likely outside whereas the rust on your shaving razor is less likely to have been exposed to animal dung.