Calculate the gravitational potential energy of a 1200 kg car at the top of a hill that is 42 m high.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

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 .