Gravity is the force by which a planet or other body draws objects toward its center.
The force of gravity keeps all of the planers in orbit around the Sun. What does the
force of gravity depend on? *
A)mass and weight B)weight and speed C)mass and distance D)speed and distance

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.