The kinect energy of a book on a shelf is equal to the work done to lift the book to the shelftrue or false

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?