Agas contained in a piston has a pressure of 100 torr and a volume of 1.0 l determine the pressure of the gas if it is compressed to a volume of 0.75 l"

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Disney, viacom and aol time warner are examples of

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)