When the medium is uniform, how do light waves travel through it?

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Most of the volume of an atom is occupied by the

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)