Alarge block is being pushed against a smaller block such that the smaller block remains elevated while being pushed. the mass of the smaller block is =0.45 kg. it is found through repeated experimentation that the blocks need to have a minimum acceleration of =16 m/s2 in order for the smaller block to remain elevated and not slide down. what is the coefficient of static friction between the two blocks?

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain