Lily entered a skate, race that has different parts to it: the Skate Leg, the Row leg and the Bike Leg portion of the race. Her time and distance measurements for each leg of the race are entered in the table below.

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.