A 20 cm diameter sphere is totally enclosed by a large mass of glass wool A heater inside the sphere maintains its outer surface temperature at 170C while the temperature at the outer edge of the glass wool is 20C How much power must be supplied to the heater to maintain equilibrium conditions ...

A 20-cm-diameter sphere is totally enclosed by a large mass of glass wool. A heater inside the

Question:

A 20-cm-diameter sphere is totally enclosed by a large mass of glass wool. A heater inside the sphere maintains its outer surface temperature at 170ºC while the temperature at the outer edge of the glass wool is 20ºC. How much power must be supplied to the heater to maintain equilibrium conditions?