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

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.

Which accurately compares concave and convex lenses?