A ball is thrown straight up from the ground with an unknown velocity. It reaches its highest point after 5.5 s. With what velocity did it leave the ground?

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

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

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.