Read the sentences below, and indicate which accurately describe the effects of earth's rotation and the angle of the sun. select all that apply. view available hint(s) select all that apply. the tilt of earth and the latitude of a city affect the degree and amount of direct sunlight that the location receives at the winter solstice. from the spring equinox until the fall equinox, the sun shines continually at the north pole (for 6 months). however, temperatures during this time never get very warm due to the high angle of the sun striking earth at the poles. the circumference of earth at the equator is 24,900 miles. based on this, a person at the equator is rotating 1040 miles per hour. (round to the nearest tens digit.) you see the sun directly overhead in anchorage, alaska, at 60° n on the summer solstice. this indicates that earth is tilted at a 50° angle.

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

Idon’t quite understand this problem