A 1.0 kg superball traveling straight down at -10 m/s hits the floor, then bounces back up at +10 m/s. Calculate the impulse.

What happens to light waves from a star as the star moves away from earth?

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.