Question

As an object becomes hotter, the rate of heat transfer from the object to a cooler body with which it is in contact would

a. decrease
b. increase
c. not change
d. No determination can be made from the information given

Answer 1

The rate of heat transfer would increase. Newton's Law of Cooling states that the rate of heat transfer between two bodies is directly proportional to the temperature difference between them. Hence as the temperature difference increases, the rate increases

Answer 2

Answer:

b. increase

Explanation:

According to fourier's law of conduction the rate of transfer of heat from a hot body to cold body is directly proportional to the temperature difference of the bodies

$Q= \frac{L k \delta T}{A}$

L= length of the object

A= area of contact

ΔT= temperature difference

k= thermal conductivity.

therefore we can say that As an object becomes hotter, the rate of heat transfer from the object to a cooler body with which it is in contact would

b. increase