Recent comments in /f/explainlikeimfive
dkf295 t1_j2dxbaw wrote
Reply to comment by adept-grumblefish28 in ELI5: Why can't cell phones come standard with a thermometer? by [deleted]
According to Garmin -
“The Temperature widget will display the ambient air temperature near the barometric altimeter port. This reading can be affected by body heat. To get the most accurate temperature reading, remove the watch from your wrist, place it on a temperature neutral surface, and wait 10 minutes or more.”
As another user stated, a smartwatch also runs a lot cooler even than an otherwise idle smartphone. It also spends time on your arm as opposed to in your pocket which helps it cool.
Antman013 t1_j2dx9kv wrote
Reply to comment by constantino675 in 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
This is EXTREMELY difficult to accomplish, however, and usually only done by folks wanting "bragging rights". So called "century shavers" . . . in a practical sense, there is simply no need to be this fanatical about edge wear on disposable blades.
​
I have seen what both a safety blade and a straight razor edge look like under an electron scope, and u/Berek2501 is correct. The "edge" is actually a line of "peaks and valleys" which, after contact with your hair, have the tips rounded off or over. Honing is done to "straighten" or realign those peaks and valleys and restore that keen edge. It's quite fascinating to see how "uneven" a truly "straight edge" is under extreme magnification.
berael t1_j2dx8d4 wrote
Reply to comment by SpencerLoco in ELI5. Why is honey and lemon a popular cure for cold like symptoms. What makes lemon more effective than say an orange or lime? by alexkid_in_realworld
Pure honey is antibacterial because it sucks the water out of bacteria and kills them. Honey diluted into water is yummy bacterial food.
MissApocalycious t1_j2dx7ql wrote
Reply to comment by Duradon in ELI5. Why is honey and lemon a popular cure for cold like symptoms. What makes lemon more effective than say an orange or lime? by alexkid_in_realworld
Taking vitamin c when you're sick doesn't do anything to help you, really. Potassium can in some cases, if your reaction to the illness is doing something to cause you to lose potassium (sweating, vomiting, etc) but for just a cough probably won't make a difference.
DragoonXNucleon t1_j2dx414 wrote
Reply to ELI5: How web crawlers and other engines don’t constantly get infected with viruses? by Officialsparxx
ELI5: You can pretty easily tell if something is a book right? So you are looking for something to read. Pick it up. Is it a book? No. Toss it. Yes? Read it.
Search engines do the same with everything they process. Malware can't be embedded in a webpage, its a seperate executable downloaded by the page. So anytime the crawler reads something "is it a webpage?" No, toss it. Yes, process it, then find everything it links to, repeat.
The_camperdave t1_j2dx3xk wrote
Reply to comment by [deleted] in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
> So while he lost those funds, they still exist in the market; it just means that someone else now has access to the profits that were previously associated with his ownership in XYZ Corp.
Not necessarily. Just because the stock value of XYZ corp went down, doesn't mean anything else went up. Stock values are not a zero sum game.
MattyHurricane t1_j2dx16f wrote
Reply to ELI5: How do they take an MRI of a heart when it's still pumping, and therefore moving? by Vespiri2d
I have had both a regular and cardiac MRI. The regular one was no big deal, just kind of hang out and not focus on the confined space. The cardiac one was exhausting. Pretty much a 2 hour crunch/pilates/yoga/cardio session in a hamster tube.
My sense is that they took some backing images, but all of the important imaging was some variation of hold your breath and tense your muscles for 20 seconds, or exhale and tense your muscles for 20 seconds. Basically, intentionally ensure that you are removing any consciously controlled movement so that they can focus just on the heart and try to snap images throughout the beat.
Like taking screen shots of a moving video. 98% will be crap, but you will get some clear images. Now make 50 attempts over 2 hours, and each attempt requires you to hold a 20 second crunch while remaining perfectly still, in a tube. I literally had to rest in my car for 15 minutes before I drove home. Physically beat up.
[deleted] t1_j2dx0qr wrote
Reply to comment by FormallyKnownAsKabr in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
[deleted]
SirTruffleberry t1_j2dx0ol wrote
Reply to comment by 54yroldHOTMOM in ELI5: How did we realise the mind is in the brain? by theembryo
I would say that empirical truths (obviously not mathematical or abstract truths) are statements about an efficient model that seems to agree with sensory data and predicts incoming data. That's pretty streamlined but hits the biggest points, I think.
NobblyNobody t1_j2dwwh3 wrote
Reply to comment by Ansuz07 in Eli5 getting ‘goosebumps’ on skin by Conscious_Internal17
kinda mind blowing there is a tiny muscular infrastructure there still, like almost everywhere, just doing nothing most of the time.
tryinadosomethingher t1_j2dwugh wrote
Reply to comment by DonutCola in ELI5: Why does putting one foot out from under the blankets bring so much relief of heat while laying in bed? by SirDuke6
Heat rises. When hot air from the blanket open and touch the cold air.. we’ll you know what happens when a cold and a hot front meet. Ever open the door after a steamy shower and see the air move fast? Same principle with the hot air under your blanket just not as drastic
Captinhairybely t1_j2dwsc0 wrote
Reply to comment by Ellie-Bright in ELI5: How did we realise the mind is in the brain? by theembryo
Because this is a thread about how we came to realise the brain and mind were in the same place. It's just a bit of historical context that I thought was worth noting (as it just shows humans have had varied ideas about the mind and brain... Who's to say any of us are correct? Maybe the mind is just a localisation of a collective consciousness idk)
jsveiga t1_j2dwqyb wrote
Reply to eli5: How big a crack does water need to leak through and does the material of the container impact the size required? by p2molvaer
I've looked at some papers, and it seems that usually the material of the container doesn't directly affect the result, but the roughness of the crack "walls" does, as does the crack geometry.
The crack geometry includes lengh too (container wall thickness), and of course water pressure is also a factor.
So your answer is "it depends". It depends on more than just the crack size, but crack length, width, roughness, and water pressure.
here's one of the papers: https://www.nrc.gov/docs/ML0708/ML070860286.pdf
stiveooo t1_j2dwoyc wrote
Reply to comment by angrybird7677 in ELI5: Why do companies require annual budget be spent 100%? by angrybird7677
you are right, the budget comes from prev year so it was already taxed, so saving money is good, thats why the stock goes up when a company decides to fire people=saving money.
But the company wants to save money but the departments want to spend it all so they dont receive less next year.
KamikaziAvalanche t1_j2dwn0o wrote
Reply to comment by hh26 in ELI5: Tech billionaires lost $400 billion this year. Where does it go? Does anyone gain? by ChickenEnthusiast
To quote Luke Skywalker, "Amazing. Every word of what you just said is wrong."
Aggravating_Tap4 t1_j2dwhz3 wrote
Reply to ELI5. Why is honey and lemon a popular cure for cold like symptoms. What makes lemon more effective than say an orange or lime? by alexkid_in_realworld
I thought lime was like antibacterial. Cant you eat raw meat and fish with just lemon and lime? Also honey is sugery so not great when a little ill.
redsedit t1_j2dwhin wrote
Reply to comment by AbsurdistWordist in ELI5. Why is honey and lemon a popular cure for cold like symptoms. What makes lemon more effective than say an orange or lime? by alexkid_in_realworld
That makes sense. Whenever I get sick, I always have a really bad cough and keep coughing for about a month (worse part of being sick IMHO). I've tried pretty much every cough syrup there is, including codeine. They don't do anything.
I've found lemon juice to be the only thing that helps. Orange juice does nothing (it seems to make it worse actually). I actually keep some miracle berry tablets on hand so I can drink pure lemon juice.
tryinadosomethingher t1_j2dwddw wrote
Reply to comment by DonutCola in ELI5: Why does putting one foot out from under the blankets bring so much relief of heat while laying in bed? by SirDuke6
Don’t need a fan.. do you o own what happens when hot and cold air touch? When a cold front hits a hot front? It’s creates rapid air movement :) this can be felt when opening a bathroom door after a hot shower
Potato_Octopi t1_j2dw2wk wrote
Budgets can be pretty big, and buying a few things extra to fill out the budget isn't a big deal.
Budgets get changed all the time. If you don't use it this year it may be gone the next. Getting authorization to exceed budget can be difficult, while spending what's already authorized is easy.
Take the converse.. if everyone is hyper incentivized to come in below budget you get scrooges that pay poorly, understaff and remove free coffee from the office. You get a bad place to work.
angermouse t1_j2dw1jh wrote
Reply to comment by GanondalfTheWhite in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
It takes advantage of the fact that light and electrical fields travel about a million times faster than sound (300 million m/s versus 300 m/s). If you think about it, sound is extremely slow. Hearing echoes is a common occurrence and animals like bats even use it for navigation.
54yroldHOTMOM t1_j2dvxb3 wrote
Reply to comment by SirTruffleberry in ELI5: How did we realise the mind is in the brain? by theembryo
What is truth? Are they facts or what someone believes to be true? And what if everything is true? Even the things that “aren’t”. Or if truth is in a state of flux until someone observes it.
fizzlefist t1_j2dvx2u wrote
Reply to comment by Pocok5 in 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
It’s also why Sir Isaac Newton is the deadliest son of a bitch in space.
ProveISaidIt t1_j2dvvkx wrote
Reply to comment by Fred2718 in ELI5: Why plates get too hot to touch in the mircrowave but the food can still be cold? by jerrycotton
No one said something cool can transfer heat to something hot. Cold absorbs heat.
I said as the food warms from the microwaves that heat transfers into the plate. I don't know about ceramics containing metal elements or not.
I do know that Corning Corelle is made from dufferent types of glass, as explained in the link. I have been using Corelle in microwave ovens for almost 40 years and it does not get hot the way a stoneware dish does.
I can only speak from my own experience. If I want to preheat a Corelle plate I have to put water on it as the water transfers heat into it.
MyMomSaysIAmCool t1_j2dxdw8 wrote
Reply to comment by zap_p25 in Eli5 How exactly does Noise cancellation work? That too in such small airbuds by Professional-Ad3441
That's what I said.