A 10,000 kg car going north at 22 m/s collides with a 50,000 kg truck moving east at 25 m/s. The two vehicles stick together and move in a northeastern direction. With what speed do they move right after impact and in what direction (degrees northeast)?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

Aphase diagram assumes is kept constant.