When light reflects of a boundary, the angle at which it enters the surface is 23° (measured with respect to the normal to the surface). What is the angle at which it
exits the surface?
0°
O 24°
239
25°
20°

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Answerinternal combustion engine fuel;