Recent comments in /f/explainlikeimfive
dirschau t1_iydrhzy wrote
It's resonance. Like a musical instrument, different shapes and sizes make certain notes louder. Larger volume - lower note. Smaller volume - higher note.
So as you fill up the glass/bottle/whatever, you decrease the air volume, making the sound pitch up.
Landon_Mills t1_iydr97d wrote
Reply to comment by dirschau in ELI5: why can you hear when a glass is being filled up with water? by RestlessARBIT3R
Ahh that makes sense, I like your explanation more
dirschau t1_iydr24o wrote
Reply to comment by [deleted] in ELI5: why can you hear when a glass is being filled up with water? by RestlessARBIT3R
No, that's not it for two reasons
One, surface of the water usually just plainly doesn't move fast enough for that effect to take place. And the pitch will change regardless of how fast it fills up.
Two, you get the sane effect from any direction, even behind the bottle. And that's completely illogical for Doppler.
It's just plain old resonance.
Red_AtNight t1_iydqvdo wrote
It’s called Helmholtz resonance. The sound is bouncing off of the bottom of the container and reverberating between the top of the container, and the top of the water. As the container fills, there’s less room for the sound waves to reverberate, which makes the waves shorter, and thus sound higher pitched
[deleted] t1_iydpw49 wrote
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[deleted] t1_iydpb3n wrote
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throwawaydanc3rrr t1_iydp5i8 wrote
Reply to comment by reviewbarn in ELI5 If money can come out of nowhere, can't it pop into somewhere? by TheKrillers
If the $2T in stimulus was not paid for with taxes and debt, please enlighten me, how was it paid for?
IonizingKoala t1_iydp33x wrote
Reply to comment by c00750ny3h in ELI5: How does machine learning work? by Nightmarewasta
I think there's a distinction between AI and ML that needs to be made here. For example Deep Blue, the chess machine that beat Kasparov, was certainly AI, but had relatively little ML involved. Earlier chess computers were AI, but had no ML.
Aurigae54 t1_iydouoo wrote
Reply to comment by drafterman in ELI5: Why does stuff dissolve in hot water more? by samuelma
I was thinking of pressure then, oops, regardless it doesn't change the fact that average kinetic energy of the water molecules is the main driver of solubility
UncontrolableUrge t1_iydoqp4 wrote
Reply to comment by peter3hg in ELI5: Why is wales a country but not the states of the US by coolredditfan
A fair point. I did oversimplify.
croninsiglos t1_iydoc9u wrote
Reply to ELI5: What is a Fast Fourier Transform? by edeneb
It’s a faster version of the fourier transform using some patterns seen in the original.
This video was really well done on the subject:
IonizingKoala t1_iydnmvi wrote
Reply to comment by TyrconnellFL in ELI5: Why does stuff dissolve in hot water more? by samuelma
The FDA has found that anti-microbial soap is equally as effective as regular soap. But the main anti-microbial ingredients can actually be harmful to the environment, so it's worse if you care about the environment.
It's different in a hospital setting, I think they have some more unique reasons for needing to use anti-microbial soap.
dimonium_anonimo t1_iydmlgv wrote
Reply to comment by nmxt in ELI5: Why does stuff dissolve in hot water more? by samuelma
Why do gases tend to have higher solubility in cold water?
Egon88 t1_iydlviz wrote
Reply to comment by Skellephant in ELI5: What does sleeping under a weighted blanket actually do? by Dominika_4PL
Is it possible you have sleep apnea? I had a similar issue for many years but now that I wear an appliance to bed it doesn't happen anymore.
fubo t1_iydlhay wrote
Reply to ELI5: If a company is public and a person owns 75% of the shares, can they be kicked out/fired by other board members? by OrdinarilyAliveHuman
One possibility is a minority shareholder lawsuit.
You might own a majority of the company, but the company still has obligations to the other shareholders too. It's still supposed to be working for the profit of all shareholders. If you take a profitable company and turn it into your own personal slush fund, its other shareholders can sue for damages.
berael t1_iydl73j wrote
Reply to eli5. If Windows is an 11gb download, why do you need at least 65gbs free on your hard drive to run it? by graemo72
11 bags of groceries can fill 65 cabinet shelves once you unpack and sort them all. They're a lot more compact when they're all shoved into the grocery bags, but that's unusable - you need to unpack everything so it's easily available when you need it, even though it ends up taking up more space.
ialsoagree t1_iydj3qr wrote
Reply to comment by Aurigae54 in ELI5: Why does stuff dissolve in hot water more? by samuelma
You said "that's not true" but then discussed a bunch of stuff I never mentioned. I never mentioned whether or not hydrogen bonding only applies to dissolving substances. I never mentioned water being a liquid at room temperature.
But I will address this:
>they are just two ends of a spectrum representing how little/how much energy you need to break an attraction.
At a physical level I agree with you. But not at a categorical level. These things are categorically distinct when we talk about them because of the size of disparity in energy required.
Let a cup of salt water sit and salt will spontaneously crystallize out of the water within hours. Just through Brownian motion.
Stable molecules could take billions of years to change their structure, or longer. This is why we categorize "water" as it's own molecule, and "salt" as it's own molecule, but we don't categorize "salt water" as a molecule - we categorize it as a solution of 2 molecules.
TheSmellofOxygen t1_iydihsg wrote
Reply to comment by [deleted] in ELI5: Would the sound of a spaceship leaving Earth slowly disappear to the people inside of it? by 4thesuns
Wow, the more you know! I'm sorry for misleading anyone.
Existing-Metal-5211 t1_iydig8t wrote
Reply to comment by Menolith in ELI5: why is using "goto" considered to be a bad practice in programming? by Dacadey
Said like someone who never wrote in ML/ASM.
Existing-Metal-5211 t1_iydidtc wrote
Reply to comment by Megalocerus in ELI5: why is using "goto" considered to be a bad practice in programming? by Dacadey
Naw... I did some stuff like that in basic by poking the basic code with destination. I cannot recall why I didn't use on goto for that project tho.
obiwanjacobyx7x t1_iydi4og wrote
Reply to comment by xanthraxoid in ELI5: Why are pills those specific shapes and sizes? I've noticed ibuprofen is always smaller and tastes sweeter than paracetamol. Codeine is tiny and amoxiclav pills are huge. Is this to make it harder to confuse them, or is it because of the way the active ingredient is released in the stomach? by mwclarkson
You always end up tasting anything you snort, it drips from your sinuses down your throat, and inevitably that bitter taste is part of the ritual of drug use in itself.
Sea_no_evil t1_iydi3g8 wrote
Reply to comment by Sloloem in ELI5: why is using "goto" considered to be a bad practice in programming? by Dacadey
Yes. IOW, Goto is a primitive instruction not too far removed from the assembly language -- the native language of the chipset itself. As programming languages get more sophisticated, the need for goto goes away. The fact that most languages still have a goto instruction is really more about history than function.
tdscanuck t1_iydi2sf wrote
Reply to comment by Wendals87 in ELI5 How is the Tether price I pay determined? by LGZee
Read the report you linked to.
Among other things: -Tether promises on that page to publish reserves daily. The last accounting report is Sept 30, 2023 -That report specifically notes two ongoing lawsuits, the outcome of which is not included in the audit results (because they’re still going) -The audit report shows $56B in cash & equivalent reserves against $67B in Tether liabilities…I.e. they’re about $11B short of actually backing their token. The balance is made from bonds & precious metals (probably fine), and outstanding loans (definitely not fine…the recoverability of those loans is unknown). Most believe that those loans are actually to their parent company, which means they’re not real at all, they’re just shell game accounting. That’s what they’re trying to determine in the lawsuits and, so far, Tether has not responded to.
Short version: their own auditor’s report says they don’t have the cash they claim to and the auditors can’t tell, and Tether isn’t saying, where the balance is actually coming from. It’s definitely not cash and it may not exist. If it did, the lawsuits would be over quickly. The fact that they aren’t tells you something.
Edit: I dig into the footnotes.., it looks like they’re double counting the gold they have to back Tether Gold tokens as precious metal reserves for Tether. Which means their precious metal reserve that’s backing Tether also really isn’t…it can back Tether Gold or Tether but not both. So the gap is closer to $11B than the audit report summary makes it seem.
Existing-Metal-5211 t1_iydhxaj wrote
Literally because one guy said so and others latched onto it. It's like he never wrote in ML/ASM at the time. Nothing wrong with goto, its not bad. There are bad usages of course. I look at the "goto bad" folks as dumb asses following an unvetted religious assertion, and I'd love to see them program in ML. Their code would be bloated shitware.
What is more important is to document, especially strings, and complex functions. I found an old phreak tool/code hacker I wrote in 1988 on a the scene database. The gotos are not what makes it hard to follow. It's my various string handlers and no documentation of my variables.
Structured programming is a great idea; but not necessary for readable or useful code. Further, this religious bullshit killed many of the 'i program for myself' coders by making simple things more complex. Good programming means understanding the tools you have and implementing them to serve your desired ends. Goto allows for smaller code in certain situations, along with easier to read code in others. As line numbers were replaced with labels (like in qb4.5) readability options also increased.
10 print "i love goto! ";
20 goto 10
or
home
print "i still love goto! ";
goto home
TLDR: some jackass who didn't consider ML said something stupid about spaghetti code and readability and people took it as religious fact.
drafterman t1_iydrkh3 wrote
Reply to comment by Aurigae54 in ELI5: Why does stuff dissolve in hot water more? by samuelma
It is also the average kinetic energy of the water molecules that is a main driver of volume as well, so the concepts are not unrelated.