An 850 kg car is rollercoaster cruises along a level stretch of track at 24.0 m/s. The rollercoaster encounters a hill. If there is no friction present, to what height does the roller coaster climb?

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.