A ball is thrown from point X and follows path XYZ. Air resistance is negligible. Which quantily is zero when the ball is at the highest point Y of the path?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

The solid that is formed and usually sinks to the bottom of a solution is the

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate