A capacitor consists of a set of two parallel plates of area A separated by a distance d. This capacitor carries a charge Q. If the separation between the plates is doubled, the electrical energy stored in the capacitor will be...a) unchangedb) quarteredc) halvedd) doublede) quadrupled

Answerit increases at a steady rate;

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.