What is the definition of temperature?
a. how readily atoms give up their electrons
b. the adding of heat or cold to a substance
c. how close electrons are to an atom's nucleus
d. the measure of average kinetic energy of molecules of a substance

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Hydrogen and helium are both members of?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?