If you’re drinking a hot cup of coffee right now, it will ultimately lose heat by the process of conduction. In other words, the rate of cooling of a hot body is proportional to the difference in temperature between the body and its surroundings. Who defined this “Law of Cooling”?
Sir Issac Newton
The answer is Sir Issac Newton. Newton’s law of cooling states that the rate of heat loss of a body is directly proportional to the difference in the temperatures between the body and its surroundings. More from Wikipedia.