Which of the following statements are true? (Select all that apply.) For a simple harmonic oscillator, the period is proportional to the square of the amplitude. If the net force on a particle undergoing one-dimensional motion is proportional to and oppositely directed from the displacement from equilibrium, the motion is simple harmonic. For a simple harmonic oscillator, the frequency does not depend on the amplitude.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Coal contains energy. a. light b. kinetic c. chemical d. mechanical