At 19°c, a rod is exactly 19.11 cm long on a steel ruler. both the rod and the ruler are placed in an oven at 280°c, where the rod now measures 19.26 cm on the same ruler. what is the coefficient of thermal expansion for the material of which the rod is made? the linear expansion coefficient of steel is 11 x 10-6 1/c°?

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?

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

The air that we breath is made mostly of which gaseous molecule