A piston-cylinder contains 5 kg of an ideal gas (cv = 0.7 kJ/kg∙K, R = 0.3 kJ/kg∙K) at 100 kPa and 327ºC. The gas is cooled at constant pressure until it loses 1000 kJ of heat. Determine the entropy change of the gas, in kJ/K, and the required temperature of the surroundings in order to assure that there is not a violation of the second law of thermodynamics?

The experiments with static charges were done by:

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.