If you approach a red light and a traffic officer directs you to go through the intersection without stopping, you should
a go through the intersection without stopping
b stop until the light turns green
c stop until the light changes to yellow
d stop, then drive on carefully

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

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.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.