Define the concept of inertia.
a. the property of an object to change its energy.
b. the property of an object to keep moving at its current speed and in its current direction.
c. the property of an object to have its motion changed by an outside force.
d. the property of an object to experience the same force it applies to another object.

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

With which of the following is the weak nuclear force associated? a. lightingb. nuclear decayc. ocean tidesd. stactic cling

What is the main difference between the formulas for kinetic energy (ke) and gravitational potential energy (pe)? a. ke depends on position and pe depends on motion. b. ke depends on motion and pe depends on position. c. both energies depend on motion, but only ke depends on position. d. both energies depend on position, but only pe depends on motion.