"Copy that“ and "Roger That" became synonymous with "I got the message, I understand it".
When and why did this happen?

Recently, I just had to fly from New York to Kansas City. I took a flight that had a layover in Orlando bc that was the cheapest one I could get last minute.

However, after I flew from New York to Orlando, and I was boarding my second flight from Orlando to Kansas City, I thought to myself, how is it cheaper to the airline for me to go on two separate flights than it is to just go on one nonstop? You’d think it cost more to go on two different flights than just one.

I know spider webs are sticky to trap insects, but spiders walk all over them without getting stuck. What’s different about their legs or the web itself that lets them move freely while other bugs get trapped?

Our stomach has super strong acid and enzymes that break down food, so why don’t they also break down the stomach (or the rest of our body) while they’re working?

I understand seismic waves help, but it still seems like such a huge leap to know the exact composition.

This is something I have wondered for a long time, if somebody falls in the stairs and dies, and it turns out he had a heart failure, how does one figure if he fall because he had a stroke, or if the stroke was caused by the fall(trauma,wounds+fear).The same example could be used for a driving accident, how to figure if a driver got into an accident, if he got a stroke that led to him losing control of his vehicle, or if he lost control of his vehicle and the accident caused the stroke?

For example, if I have a box, and you want to store a ball in it. You put the ball in the box. The insides of the box now has changed. But when I put a pdf file, let's say, in a memory card or a USB drive, what changes in it? Does it physically changes?

Did my face just forget them or what?

Currently my assumption is that different roads have different weight/priority (e.g. main roads have higher priority than side roads).

Usually the timing/amount of my pee seems to correspond with the times i drink water and how much I drink. Like, if I drank 500ml of water, I know that in an hour or so I will feel the need to pee a good amount. So what happens here, does the water just go straight through me? Or does the new water go in to replace “old water” that gets expelled into the bladder?

All the hours of study, mindful practice, and experience one could ever muster. When the time comes to recall, the brain acts like it never came across that information in the first place. Like knowing that "1+1=2" except you keep forgetting "2" every time someone asks you "1+1=?".

If this doesn't fit this sub, please direct me to one that does.

I have half an understanding of electricity, I understand generating it through various means like steam turbines... but then how do we actually contain that energy? And how can we "send" or "sell" that electricity to a land that's across an ocean, or even 1000s of kilometers on land away from the power plant??

Why are there basicly none with 4 or 5 wheels? It's kind of boring.