What an image of a distant object is brought into focus in front of a persons retina the fact is called

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

What is special about a dc circuit ?

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?