Chapter 9, Problem 9RAT

Thermal convection is linked mostly to

(a) radiant energy.

(b) fluids.

(c) insulators.

(d) All of these.

To determine

The correct option for the statement "Thermal convection is linked mostly to".

Answer to Problem 9RAT

The correct option for the statement "Thermal convection is linked mostly to" is option (b).

Explanation of Solution

When a container of water puts on the flame to warm it, then the transfer of energy takes place due to the difference in the temperature of the upper and bottom layers of water. As the bottom layer of the fluid gets heated, they spread apart due to the faster movement of molecules and become less dense as compared to the upper layer and move towards the upper layer, and then the cooler molecules of the upper layer travel towards the bottom.

In this way, the fluid gets heated by the convective current. So it can be seen that the thermal convection is linked mostly to fluid.

Conclusion:

Therefore, the correct option for the statement "Thermal convection is linked mostly to" is option (b).