What is a "curie"? standard charge of alpha particles

mass of one alpha particles

standard emissions rate of alpha particles

a unit of gamma radiation

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

11) burning your hand when accidentally touching a hot plate is an example of which heat transfer? a. conduction b. convection c. radiation d. none of these