The 20- ampere branch circuit required for bathroom receptacle is permitted to serve equipment other than receptacles only under which of the following conditions? 1) when the circuit is protected by a GFCI circuit -breaker
2) when the circuit supplies a single bathroom
3) when the receptacle is built into the lighting fixture
4) none of the above

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.