Water displacement is used to find what?

a. volume

b. density ​

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)