A 3.53 kg piece of material is heated from 19.3oC to 238oC using 609 kJ of energy. Assuming an efficiency of 0.346 for the heating process, calculate the specific heat capacity of the material.

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

For which pair of objects would adding the same a

What is the single most important equation in all of physics?