Aroller coaster is traveling at 13m/s when it approaches a hill that is 400 m. long. heading down the hill, it accelerates 4.0m/s^2 . what is the final velocity of the roller coaster?

An uncharged nonconductive hollow sphere of radius 18.0 cm surrounds a 12.0 µc charge located at the origin of a cartesian coordinate system. a drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. calculate the electric flux through the hole.

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

What are the applications of electromagnetic waves