An object initially at rest breaks into two pieces as the result of an explosion. one piece has twice the energy of the other piece. what is the ratio of the masses of the two pieces? which piece has the larger mass?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct