Which characteristics describe a point charge ?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

What is the coefficient of kinetic friction μk between the block and the tabletop?

Energy transformations that involve one transformation from one type of energy to another are called transformations.