A tennis ball is struck and departs from the racket horizontally with a speed of 26.5 m/s. The ball hits the court at a horizontal distance of 20.8 m from the racket. How far above the court is the tennis ball when it leaves the racket?

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Explain what happens at the saturation point when adding salt to water at room temperature.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?