A piece of sandpaper may turn a transparent plastic window into a translucent plastic window. Propose a
hypothesis to explain why sanding the surface makes the window translucent. Use the concept of light rays in
your explanation.

Nps pollution is caused by rainfall or snowmelt moving over and through the ground. nonpoint source pollution can include: excess fertilizers, herbicides and insecticides from agricultural lands and residential areas. oil, grease and toxic chemicals from urban runoff and energy production

There was no intial y-momentum so the net final y-momentum must also be 0. they can have final velocities in the y-direction

Chemical energy is converted to throw and if you don’t mind you