Which sentence is a correct statement of Newton's second law? An object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force.

Every mass in the universe is attracted to every other mass in the universe.

Every action has an equal and opposite reaction.

When an object experiences a net force, it will accelerate at a rate determined by its mass.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.