A house that is losing heat at a rate of 50,000 kJ/h when the outside temperature drops to 4 °C is to be heated by electric resistance heaters. If the house is to be maintained at 25 °C at all times, determine: a) the reversible work input for this process, and b) the irreversibility.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Why there is no inductive reactance in dc circuits

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?