A system absorbed 44 J of heat from its surroundings. After doing work the increase in the internal energy of the system is 32J. How much energy was used by the system to do useful work?

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

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

What’s #16 asking and how do i solve it?