Answer:
Light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction . the light speeds up going into a less dense substance, and the ray bends away from the normal.
Explanation:
Total number of buses =9178181
Normal force, weight, Kinetic friction, and air resistance are a few I think of the top of my head.
I hope this helps
OK. Thank you. That's an impulse of 200 Newton-sec to the left,
telling us that the cart's leftward momentum increases by 200 kg-m/s
(or its rightward momentum decreases by that amount).
Did you have a question to ask ?
