Four people are needed to lift a tv set with a single fixed pulley. how many people will be needed to lift the same tv set with a 2 fixed, 2 moveable pulley system?

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

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

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way