Which statement explains why the same side of the moon is visible from earth every night? A. The moon's rotational period and orbital period are unequal.

B. The moon's rotational period is half that of its orbital period.

C. The moon's rotational period is equal to its orbital period.

D. The moon's rotational period is twice that of its orbital period.

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Which is an example of an exothermic process?

Can someone me with my physics questions? i need correct answers only!