A sphere of radius 10 cm is hung inside an oven walls are at a temperature of 1000 K. Calculate total energy incident per second (in `Js^(-1)`) on the sphere. Given `sigma = 5.67 xx 10^(-8) SI` units.

A conducting sphere of radius 10 cm is given a charge of +2xx10^(-8)C . What will be its potential?

Calculate the temperature (in K) at which a perfect black body radiates energy at the rate of 5.67W cm^(-2) . Given sigma = 5.67 xx 10^(8)Wm^(-2)K^(-4) .

Considering the sun as a perfect sphere of radius 6.8xx10^(8) m, calculate the energy radiated by it one minute. Take the temperature of sun as 5800 k and sigma = 5.7xx10^(-8) S.I. unit.

The emissivity of tungsten is aproximately 0.35. A tungsten sphere 1 cm in radius is suspended within a large evacuated enclosure whose walls are at 300 K. What power input is required to maintain the sphere at a temperature of 3000 K if heat conduction along the support is neglected? sigma=5.67xx10^-8 SI units.

The emissivity of tungsten is aproximately 0.35. A tungsten sphere 1 cm in radius is suspended within a large evacuated enclosure whose walls are at 300 K. What power input is required to maintain the sphere at a temperature of 3000 K if heat conduction along the support is neglected? sigma=5.67xx10^-8 SI units.

A solid copper sphere (density =8900kgm^(-3) and specific heat C=390Jkg^(-1)K^(-1) ) of radius r=10cm is at an initial temperature T_(1)=200K . It is then suspended inside an chamber whose walls are at almost OK . Calculate the time required for the temperature of the sphere to drop to T_(2)=100 K , sigma=5.67xx10^(-8)Wm^(-2)K^(-4) .

An iron sphere has a radius of 10 cm at a temperature of 0^(@)C . Calculate the change in volume of the sphere if it is heated to 100^(@)C . Given alpha_(Fe) = 1.1 xx 10^(-6).^(@)C^(-1)