A light wave has a wavelength of 900 nm. What is the frequency of the light wave?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

What does the law of conservation of mass state?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.