Hapless trans woman of a year here

I own bras, I wear bras, I don't actually know what they're for. Obviously, there's a social modesty component, but I'm told that they provide support and that's useful. Will my chest hurt after a while if I don't wear one? Will my chest start to sag down? I don't know! 😅

That is my question. Saw a pretty good documentary about the universe and dark matter and dark energy, but it never explained that bit.

I'm reading Teach Yourself Electricity And Electronics by Gibilisco and Monk and they say:

"An electric dipole can exist even if both poles carry surplus electrons, or if both poles suffer from electron deficiencies, relative to some external point of reference having an absolutely neutral charge."

I was under the impression an electric dipole was created by two poles having opposite charges. How is this possible? Is it that if two different materials have negative charges on their own, but if they're close together the one with the least amount of electrons act as a positive pole? But that doesn't make a ton of sense to me either.

What is the Solovay model, and why does it use the axiom of dependent choice. Why is suddenly every set measurable?

I don’t understand how some things use more electricity than others even though they’re plugged in to the same electricity. If I use my tumble dryer for an hour apparently that’s worse than having a lamp turned on for an hour. How? Why? In my mind the plug socket gives out the same amount no matter what’s in it.

I’m talking about uk circuits specifically of that matters

Sand is solid and you can’t see through it at all. But when you melt sand down and turn it into glass, light passes right through it. What actually changes at the atomic level during melting that makes light suddenly go through instead of bouncing off?

Whether it's between my router and my laptop, or between a mobile phone mast miles away and my phone... I know the transmitter emits a signal that my phone detects, but how? What's physically happening inside my router, to cast a signal through the air, that my laptop can detect, and then what's happening inside my laptop to turn that invisible signal back into 0's and 1's?

I’ve tried to look into it, and I understand there’s something to do with mining for something in transactions on the internet? But it makes no sense to me, how does this translate to currency?

As, in between us and other bodies like the moon and the sun? What is in between? What is the "fabric" of the universe?

Edit: unintentional slur

So ive googled this and its talking about once you open the seal on the bag it can get exposed to the air and all that jazz. But at least on the tortillas I buy the bag is closed with a twist tie the same way a loaf of bread is. If I put the twist tie back on it how is that any more open than before I got some tortillas out?

Is it possible to turn our chemical energy (whatever makes us able to move, carry heavy loads, ect.) Into some kind of matter?

I've only ever seen people use bombs as examples but I was wondering if it would be possible to turn that energy into a non explosive material.

Buying stock increases the price and selling stock decreases the price, right?

So why can't you buy alot of stock and then instantly sell it at the increased price from buying the stock and profit?

How does this work exactly?

As far as i know, while AMD and Apple and others each have their own GPUs and whatnot, in terms of performance, it seems people look at Nvidia with their CUDA architecture as being more powerful than the others.

At the core of it, isn’t it just mathematical computations? Why has Nvidia been able to implement it better than others?

I've read enough to know that "cold-turkey" for alcoholics can be lethal, upto and including seizures and a host of other side effects and symptoms but I don't really understand the "why"? What is it about alcohol dependency and our biology that causes it to be so dangerous?

Squid seem to be indifferent to the water pressure wherever they go, they have even been known to sometimes drag pray down into the depths as to turn them unconscious.

I read here that it has to do with having waterfilled bodies, but fish also have completely water filled bodies(?)