Carlos is driving home after getting some Whataburger for lunch. The Whataburger bag is full of food, and is sitting in the front seat. He is driving east with a speed of 35 m/s. There is another car driving towards him, with a velocity of -25 m/s. Relative to Carlos, how fast is the Whataburger bag moving?

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.