Which part of the electromagnetic spectrum can be detected by the human eye?
a. ionic light
b. sonic light
c. thermal light
d. visible light

Which of the following is an example of motion in two dimensions?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

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.