What describes the rate of a nuclear decay reaction?

a. the reaction rate can be affected by the amount of reactant remaining.
b. the reaction rate is fixed, but it can be altered by extreme temperatures.
c. the reaction rate can be affected by temperature and pressure.
d. the reaction rate is fixed, so it cannot be increased or decreased.

Which of the following would be considered a nec code violation in regards to the installation of luminaires? a. an outdoor lighting fixture mounted to a tree b. a five-pound, 12-inch diameter light fixture supported by the screw shell of the lampholder c. florescent lay-in fixtures attached to the framing sections of a suspended ceiling with sheet-metal screws d. track lighting over a sink, 2 feet from a bathtub