Recent comments in /f/explainlikeimfive

Flair_Helper t1_iug5uib wrote

Reply to ELI5 Are there any practical alternative fuel sources that alien civilizations might have if they weren't lucky enough to have oil and trees? by retsot

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newytag t1_iug5euj wrote

Reply to ELI5: How does volts and watts work for chargers and phones? by Micow11

>Can I use any volts/watts charger for my phone?

No.

In general:

  1. When we are talking chargers, we mean a device which converts AC electricity from a wall outlet, to DC electricity required by an electronic device
  2. The charger must support the voltage and frequency of your residential electricity supply. Any significant deviation from that can damage the charger and/or present a fire hazard.
    1. Some chargers support a range of input voltages for international use
  3. The charger's output voltage (Volts) must match the device's input voltage. Any significant deviation from that (more than about 10%) could damage the device, the charger, or be a fire hazard
  4. The charger's output current (Amps) and/or power rating (Watts, equal to Volts x Amps) should be equal or greater than the device's required current/power rating. A device will only draw as much power as it needs.
    1. A lower current/power rating can mean the device charges slower or not at all.
    2. A significant lower rating can damage the charger or device.
  5. A standard like USB is smarter than most chargers, generally speaking any charger supporting a USB standard (like USB 3.2) must support the minimum requirement, and higher currents and voltages can be supplied by both charger and device negotiating for it, you don't have to worry about incompatible electrical ratings causing damage.
  6. The plug on the charger must also match the power jack on the device. Don't assume a plug and jack are compatible even if they physically fit and the power ratings are compatible; the polarity must also be consistent (especially an issue on barrel plugs).

Or TL;DR:

  1. Use a charger compatible with your country.
  2. The Voltage on the charger must match the device.
  3. The Amps and/or Watts on the charger should be the same or greater than the device.
  4. A charging standard like USB or Lightning is designed to simplify things for consumers so you don't have to worry about electrical ratings or causing damage.
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oskitheleopard t1_iug59la wrote

Reply to comment by Klai8 in ELI5 Why are airport ceiling so high? by TrShry

I was halfway expecting the undertaker to come into the story. Really interesting and makes complete sense. I had always kind of figured people just liked big buildings and building a airport is so expensive anyway you might as well make it fancy.

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KatrineTee t1_iug456v wrote

Reply to ELI5: If you drink a gallon of milk a day before it’s expiration date, would it go bad in your stomach and make you sick? Or would nothing happen? by br0ken-rec0rd

If its something like milk the expiration date is subject. From personal experience milk can go bad way before the expiration date. It is best to do the smell test. If it smells off its already spoiled.

But the answer to your question for most everything else is no. Everything starts to digest moments after you ingest it. There's no timer.

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guess_an_fear t1_iug44j8 wrote

Reply to comment by DamionDreggs in ELI5: Why is it easy to drink a large volume of beer, compared to such a large volume of any other liquid? by Proof_Objective_5704

Not sure how you’re defining quantities of food vs liquid here, but it’s pretty well-known that liquids promote far less of a satiated feeling, which is why it’s far easier to consume large amounts of calories in liquid form than in solid form. If you really wanted to put on weight fast, for example, you should liquidise high-calorie foods to get fatter faster!

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Dependent-Law7316 t1_iug40oc wrote

Reply to comment by dimonium_anonimo in eli5 What are phonons? (this is not a typo, I do not mean "photons") by PlesiothX

No, because phonons aren’t strictly related to forces applied externally. Molecules are naturally experiencing vibrations—spring like oscillations—along all of the interatomic bonds. When you have a bunch of molecules linked together, all of those vibrations are now interconnected and affecting each other, which is what we call a phonon.

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bjanas t1_iug3v0k wrote

Reply to comment by [deleted] in ELI5 why most animals seem have a large number of sensory systems that are close to the brain? by shficjshx

No, it's because it's all a part of the nervous system and all of the sensory organs at one point started in the same place. As species evolved, the sensory organs changed/moved as much as they needed to to cause the organism to survive and be able to reproduce.

At no point did evolution think gee, can't put the eyes too far away from the brain, that'll sure take too long to see things! Evolution doesn't think. It's blind luck.

And compared to the brain's processing speed, any latency from distance to the sensory organs is miniscule

"The researchers found that, after controlling for sex, age and temperature (it turns out your nerves are quicker when you’re warm), there was a 0.27 m/s decrease in the conduction speed of one of the leg nerves (the sural nerve) for each additional centimetre in height." https://mindhacks.com/2009/05/19/tall-people-have-slower-nerves-sensory-lag/

.27 ms per centimeter is basically negligible.

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Nateorade t1_iug324p wrote

Reply to ELI5 How mortgage payment are calculated. by [deleted]

Beware that mortgage rates are now closer to 7% or higher, not 5%.

No, you aren’t missing anything. And that amount doesn’t include insurance or taxes (or utilities … or maintenance …).

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bulksalty t1_iug2daw wrote

Reply to ELI5 why does the quarterback have to call the play at the line if they’ve discussed it in the huddle by jpurcy

The QB calls an audible when he believes changing the play will lead to a better outcome than running the huddle play.

There are a huge number of defensive formations and offensive plays built to exploit each ones weakness, so if changing a play can allow taking advantage of a better matchup than the called play, many coach's systems allow the QB to make a read and change the play.

The other stuff is there to communicate various sub play options, like how a blitzing player should be blocked, and then there's a ton of chatter designed to prevent the defense from predicting the snap count.

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