Question

The net rate of heat loss by a hot body depends upon:
A) Temperature of body
B) Temperature of surrounding
C) Material of the body
D) Nature of the surface

Answer 1

Hint: Heat loss is calculated by multiplying the values of the area, the difference in temperatures of inside and outside surfaces and the value of heat loss of the material.

Complete step by step solution:
Stefan’s Law states that the rate of heat transfer by radiation from body to the surrounding when the temperature of the body is $\theta$ and that of the surrounding is $\theta_0$.
$\dfrac{{d\theta }}{{dt}} = - E\sigma A[{\theta ^n} - {\theta ^n}_o]$
Therefore, from the equation we can identify that heat loss depends on the nature of the surface, Temperature of the body and temperature of the surrounding

Thus, Option A,B,D are correct.

Additional Information:
Conduction - It occurs when a hot and a cold object are in contact. The laws of conservation of energy will tell you that until the temperature is the same, the heat will go towards the cold object (area). Suppose you have two identical spoons, but one is said directly from the fridge that it is 10 ° C, and the other is from a cup of hot coffee, say 75 ° C. Assuming that we made it into two contacts and assuming that at some point in the vacuum there was a close system, the temperature would be equal to the heat from 75 ° C and the cold one would be held.
Convection - This occurs when heat is being received from an object by rapidly moving molecules, hence liquid and gas, as the molecules contact the hot object and move away. It works like a conveyor belt hence the term.
Radiation - While conduction and convection require some contact with the substance, or it is a media for heat transfer, radiation in the form of heat transfer does not require any media, thus heat is still a vacuum, Can be transferred to space, so we can feel the heat of the sun.

Note: The surface area of ​​the objects in contact, and the temperature difference will be some of the factors for heat loss from the hot spoon. So in conductivity, the larger and colder the object, the faster it will absorb the heat. The rate of atomic activity can be relative to the amount of heat being released by the radiating object.