Two balls of same material and same surface finish have their diameters in the ratio 1:2. They are heated to the same temperature and are left in a room to cool by radiation, then the initial rate of loss of heat

Two balls of same material and finish have their diameters in the ratio 2:1. Both are heated to the same temperature and allowed to cool by radiation. Rate of cooling of big ball as compared to smaller one will be in the ratio:

Two sheres made of same material have their radii in the ratio 1:3 They are heated to the same temperature and kept in the same surroudings at a moderate temperature Show that the ratio of their initial rates of fall of temperature is 3:1 if the bodies are cooled by natural convection and radiation .

Two metallic spheres S_(1) and S_(2) made of same material have identical surface finish. The mass of S_(1) is 3 times that of S_(2) . Both are heated to same temperature and are placed in same surroundings. Then ratio of their initial rates of fall of temperature will be

Two spheres made of same material have their radii in the ratio 1 : 3. They are heated lo the same temperature and kept in the same cool surroundings at a moderate temperature. Show that the ratio of their initial rates off all of temperature is 3 : 1 if the bodies are cooled by natural convection and radiation

Two spheres of same material and radius r and 2r are heated to same temperature and are kept in identical surroundings, ratio of their rate of loss of heat is

Two spheres of same material and radius r and 2r are heated to same temperature and are kept in identical surroundings, ratio of their rate of loss of heat is

Two solid spheres of radii R_(1) and R_(2) are made of the same material and have similar surfaces. These are raised to the same temperature and then allowed to cool under identical conditions. The ratio of their initial rates of loss of heat are

Two solid spheres of radii R_(1) and R_(2) are made of the same material and have similar surfaces. These are raised to the same temperature and then allowed to cool under identical conditions. The ratio of their initial rates of loss of heat are