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the diagram shows a 25-kg box resting on a wedge which has an angle of inclination of 30° the vector value due to friction
fris 49.05 n. find the value of the coefficient of friction f
a)
0.10
0.15
0.20
0.25

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 diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.