Normal Force Practice:
1. A 12.0 kg object is resting on a flat table. What is the magnitude and direction of the normal
force acting on the object?

Anybody wanna ? (picture included? )

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.

If a balloon is taken outside on a very cold day, what will occur?