A10.0 kg box is pulled along a horizontal surface by a force of 40.0 n applied at a 30.0° angle. if the coefficient of kinetic friction is 0.30. calculate the acceleration.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

This is the number of complete movements of a wave per second.

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.