A 42.9 kg wagon is towed up a hill inclined at 19.7◦ with respect to the horizontal. The
tow rope is parallel to the incline and exerts
a force of 165 N on the wagon. Assume that
the wagon starts from rest at the bottom of
the hill, and disregard friction.
The acceleration of gravity is 9.81 m/s
2
.
How fast is the wagon going after moving
22.5 m up the hill?
Answer in units of m/s.

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

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