If the velocity of an object is zero, then that object cannot be accelerating. | True or False

In a system, when potential energy decreases, then entropy also decreases. true false

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.

How is zig zagging a form of acceleration?