For each of the three mechanical systems illustrated in Figure 3, provide the differential equation relating the mass displacement, x(t), to the applied force, f(t). M is the mass in kg, K is the spring constant with units of N/m, and fy is the coefficient of viscous friction with units of Ns/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.