During an adiabatic process in a closed system, what happens to a gas when the gas expands?

its temperature increases.
its temperature decreases.
its molecules gain mass.
its molecules lose mass.

Inductive or deductive? charles is hard to work with, since he always interrupts others. therefore, i do not want to work with charles in the development committee.

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

The energy equivalent of the rest mass of an electron is