what is collins acceleration when he starts on the line of scrimmage(at rest) and then sprints 3 m/s toward the opposing teams quarter back in only 4 seconds?

Which two particles are found in the center of an atom

What are the north and south poles of a solenoid change with?

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.