7 A 25 mm diameter shaft is pulled through a cylindrical bearing as shown n I is (1.7).The lubricant that fills the 0.3 mm gap between the shaft and the bearng o an oil having kinematic viscosity of 8*10+ m?/s and a specific gravity of 0.91.Determine the force (P) required to pull the shaft at a velocity of > m/s.Assume the velocity distribution in.the gap is linear. Bearing Lubricant Shafe 0.5 m-

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.