Two spheres of same radius have their densities in the ratio and the ratio of their specific heats are . If by radiation their rates of fall of temperature are same, then find the ratio of their rates of losing heat.
A body of area and mass directly faces the sun on a clear day. The body has an emissivity of 0.8 and specific heat of 0.8 cal/kg K. The surroundings are at . (solar
constant = 1.4 kW/).
The temperature that the body would reach if it lost all its heat by radiation is