If you are looking for an insulator you are looking for a material that a) allow the flow of electrons. b) inhibit the flow of neutrons. c) allow the flow of protons. d) inhibit the flow of electrons.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

What causes the formation of ocean currents?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?