Acord is wrapped around the outer surface of the 8-kg disk. if a force of f = (1⁄4u2) n, where u is in radians, is applied to the cord, determine the disk’s angular acceleration when it has turned 5 revol

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

An object's buoyant force and weight mean the same thing.a. trueb. false

Explain what happens at the saturation point when adding salt to water at room temperature.