Atennis ball is hit at an angle of 20° to the horizontal with the velocity of 20 m/s. what is its velocity in the y direction? a-7.2 m/s b-19.7 m/s c-6.8 s d- 0.9 degrees

In the 1980's, congress authorized the u. s. department of energy to build the wipp facility in the chicuahuan desert in new mexico. what is the purpose of wipp?

How is the gravitational force related to the distance between two objects?

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?