Which two statements are true about all generators?
.they convert motion energy to electric energy
they have a fixed pair of magnets and a rotating metal coil
.they’re powered by fossil fuels
they convert electric energy to motion energy.
they use the relative motion of a magnet and a coil of wire

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me