21.As a future healthcare professional, how could you use operant conditioning to minimize a patients’ fears or anxieties? (Remember: Operant conditioning relates to voluntary behaviors that are driven by reinforcers or punishments.)

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.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

What is a subatomic particle with a negative charge and very little mass?