A spring with a spring constant of 14 N/m is stretched from equilibrium to 2.5 m How much work is done in the process? 44 J
30 J
118 J
77 J

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring