A ball bearing, rotating at 1200 revolutions per minute, operates at a radial load of 50% of its dynamic load rating. What is the expected lifetime in hours at a reliability level of 90%

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux