An ideal gas undergoes an adiabatic process and does 25 joules of work on its environment. what is the change in internal energy? a.50 joules b. 25 joules c. 0 joules d. -25 joules

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?

What are some important factors to consider when choosing a warm-up before your workout?

How much work would it take to move a coulomb charge across a 4 volt potential difference?