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?

What is the mass of the same rock on the earth

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical