Find the electric field inside a hollow plastic ball of radius R that has charge Q uniformly distributed on its outer surface. Give your answer as a multiple of Q/ε0. Express your answer in terms of some or all of the variables R, r and the constant π. nothing ⋅Qε0

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.

If forces acting on an object are unbalanced. true or false

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.