If the sun become twice hotter it will radiate .

The surface temperature of the sun is about 6000K. If the temperature of the sun becomes twice the present temperature, then [b = 2.9xx10^(-3)mK ]

What would be the average duration of year if the distance between the Sun and the Earth becomes twice the present distance.

If the diameter and mass of the earth becomes twice becomes twice of its original value, then how will the acceleration due to gravity change ?

If temperature becomes double, the emitted radiation will be :

If temperature becomes double, the emitted radiation will be :