Acoin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates 3.0m,4.0m while a constant force acts on it. the force has magnitude 2.5 n and is directed at a counterclockwise angle of 100 from the positive direction of the x axis. how much work is done by the force on the coin during the displacement?

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

What are the factors that affect the resistance of a wire?

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