(4) All of these Explanation: Newton's Law of Cooling states that the rate of temperature of the body is proportional to the difference between the temperature of the body and that of the surrounding medium. When a body cools by radiation, then rate of cooling depends upon the following factors: • Nature of the radiating surface, that is, emissivity; • Area of the radiating surface; • Mass of the radiating surface; 10 Specific heat of the radiating body; • Temperature of radiating body and ♦ Temperature of the surrounding.