For the following calculation, ignore air resistance do not round your answer. write the answer exactly as it is. an object falls from rest and strikes the ground 19 seconds later. the object's initial height was __ meters.

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

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.

As the distance from a magnet increases, what happens to the magnet force?