When magnets come within the magnetic fields of other magnets, they move toward or away from each other, depending on their poles. The door latch shown in the picture is one of many ways magnets can be used in everyday
Life. How are magnets most likely used in this latch?

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.