Acasting weighing 3 tonnes is to be hauled by a winch, along a factory floor at a constant velocity of 10 m/min. i)- if the winch exerts a pull of 10kn determine the coefficient of friction between the casting and the factory floor? ii) if 1 tonne of componentry is now attached to the casting, how much force must be exerted by the winch to move the casting back to position at the same velocity? iii)-if the velocity required to move the casting is reduced to 8 m/min, what pulling force is now required? iv) what power ratings are required

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.