Light waves
A) Do not require a medium
B) can not travel through a vacuum
C) are not electromagnetic radiation
D) do not travel in straight lines from the source

What do you think car designers do if the damage caused by a crash test is too severe?

What are atoms of the same element with varying number of neutrons

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)