A 100 lb weight is attached to a vertical spring, which stretches the spring 1 ft. Then the weight is subjected to a periodic external force f(t) = f0 cos !t. For what value of the circular frequency ! will resonance occur?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Which statement correctly describes the relationship between frequency and wavelength?

Which best describes the weak nuclear force? it maintains attraction between the m ecules in liquids. it attracts the nucleus of one atom to the nucleus of another atom. it pulls all matter in the universe together it keeps particles that make up protons and neutrons together