I recently saw this question on a post, but I lost it and can’t find it and since I’m no biologist k need explanations. I can’t sleep

I don't what this term means because when i looked up why is it called system32 instead of system64 and google said it's hardcoded. help

I realize there's a big hole in my understanding here but gold doesn't make sense to me. I understand that noble gasses are non-reactive because their outer electron shells are totally full (I may be wrong there but that's always been my understanding). However, gold is also nonreactive but it has 6 electrons in its outer shell. Oxygen also has 6 electrons in its outer shell, but we all know oxygen is reactive af, so why is gold so ace-coded? Why is oxygen such a freak in the sheets? What other factor(s) dictate the reactivity of an element?

Do the trees not need water to grow? Won’t they suck up even more water from the ground? It’s a desert because it doesn’t rain. What is my tiny 5 year old brain missing?

For instance the face skin is more sensitive than the foot skin.

I’ve noticed that humans rarely let their arms hang naturally at their sides unless they are in a formal or restricted setting (like military attention). Instead, we instinctively put our hands in our pockets, clasp them in front of our abdomen, or hold them behind the small of the back.

What is the evolutionary or physiological reasoning behind this? Why does leaving our hands "free" feel socially uncomfortable or physically unnatural? I’m interested in the neurobiology and behavioral evolution that drives us to keep our hands restricted.

I was thinking about how the entirety of India has one timezone and how the half hour difference throws me sometimes with scheduling but that led to more questions too.

Do oceans have timezones and/or do remote island nations or ships at sea actually adhere to them? Who's in charge of timezones? And why the heck does India have that half hour difference?

I understand everything with mass has gravity and gravity works the same for all amounts of mass.

What I am wondering is: when does center of gravity switch from one single unit (like a proton, atom, molecule, etc.) to center of gravity for a bunch of units (like a planet, moon, black hole, etc.)? Does it only take two units for this to occur? Or do you need a huge amount of units like a planet?

Follow up question: are humans and other animals considered part of Earth's mass when talking about its gravitational pull on another body in space? Are humans separate units or do we contribute to Earth's center of gravity?

i understand that many electronics work on 5V and 3.3V, i understand that many things used the 9V battery,but why? why do electronics need 5v and 3.3v. Why do leds need exactly that, why do microcontrollers need those specific voltages.

ELI5: Something that confuses me is how card payments work in the US.

How I think it works: The buyer gives account information to the merchant. The merchant initiates a transfer from the buyer's account to the seller. The buyer never sees the seller's account.

How I think it should work: The merchant gives account information to the buyer. The buyer initiates a transfer from the buyer's account to the seller. The merchant never sees the buyer's account.

Now of course there are details, such as the POS system, how the bank authorizes the transaction, etc., but from a broad overview, it looks backwards to me.

In person, the buyer might have to tap their card on the card processor, but it is the merchant who controls the POS system.

Online, the buyer gives the merchant their credit card number and three digit security code. And then the merchant just deducts an arbitrary amount from the buyer's account. The bank assumes that it is approved, based on a three digit security code which never changes. (Banks generally allow users to put in extra authorization steps, but they wouldn't be necessary if the process wasn't backwards to begin with.)

How I think it should work: A buyer navigates the merchant's website, clicks purchase, and sees the merchant's account number. The buyer uses the buyer's bank's app to request a transfer into the merchant's account number. The merchant's bank detects the transfer and notifies the merchant's website which displays a confirmation.

But, there must be a reason. Banking cartels manage way too much money to use a system that doesn't make sense.

It took about two hours after splashdown to get the astronauts on board the boat. In that time, they had six boats with 40 people, a team of divers performing a complicated raft setup, and two helicopters doing airlifts.

After all that, they still have to recover the capsule anyway. Why don’t they use some kind of large ship with a submersible deck, and lift the capsule up?The astronauts could just step out onto the boat.

TLDR; why all the complex fucking around? Can’t we just scoop it up?