1) Suppose that a bar magnet is dropped through a vertical solenoid connected to a galvanometer. Explain what you would observe on the galvanometer as the magnet enters, as it is in the middle, and as it leaves the coil. Write out your answer in a clear and well supported paragraph.

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.