Err, so in a house or apartment, electricity comes from some..plant(?). Then that is continuously(?) running through the place and..then gets pushed down to the ground? And when someone plugs something into a power socket..they get access to that electricity and use its energy(?) to convert it into whatever the thing they plugged in does(?) (ex: to light up a light).
^I'm pretty much guessing most of that. How do power outlets work and where does the electricity come from to get pushed into the ground in the first place..?
So...solar cells are parts of the solar panels?
I found this little picture:
Is it saying that normally, electrons are stuck around atoms, then the sunlight hits it --> an electron is freed from the atom --> electron attracted to bottom layer so it moves through a wire making it accessible to household appliances.
I guess the layer separating them makes the electron just "know" the wire lets it get to that more electron attracting(?) layer?
Furthermore, where how the electron get back after it reaches the bottom layer o_o? Isn't the top layer less attractive than the top one? What are all the middle layers supposed to do?
Chemical batteries...so terminals are, I'm guessing, the + and the - labeled ends of a battery? Err is this about recharging batteries..? I'm not really sure how to picture what's happening.
I think I didn't know the definition of conductivity o_o. So conductivity is how easily something spreads(?) throughout an object? Like heat throughout the whole length of a wooden spoon or electricity through a whole length of wire?
And when metals are warmer they move more incoming heat more easily possibly because..uhh "electrons contribute to heat conduction" and the billiards analogy is that electrons can go zipping away faster..? But that might not be it because electron movement is impeded with heat, so it's something else? But atoms don't move?
...Oh, actually, does thermal conductivity in metals decrease with temperatures normally?
stainless steel is different though.
But for nonmetals, conductivity does increase with temperature.
But why?
And what are the billiards balls representing?