A plate inside a microwave is rotating by a motor that is connected to it's center. the plate is sitting on 3 wheels , as you can see in the picture . a. Draw a forces diagram on a small wheel b. Calculate the minimum motor's torq that is needed in order to spin the plate. given: Mass of the plate: Mp Mass of one wheel :Mw Static friction coeffient: miu(s) Radius wheel : r Radius plate : R Anything else that needed just add , thank you

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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.