Question

Three balls are joined by the metal rods.

P = 40°C, Q = 80°C, R = 40 °C. What will be the direction of flow of heat?

Answer 1

Answer:

i dont know the answer but i know this

Explanation:

heat will flow from hotter body to cooler body

Answer 2

Answer:

The direction of flow of heat is $P\leftarrow Q\rightarrow R$.    

Explanation:

Given three balls are joined by the metal rods.

And the temperature of the balls are P = 40°C, Q = 80°C, R = 40 °C.

• Given the balls are joined by the metal rods, that means the flow of heat is due to the conduction of heat.
• The rate of heat conduction along a particular direction is proportional to the change in temperature with distance in that direction.
• Assume that all the balls are made up of same material and all the balls are mutually connected with the same metal rod at same distance.
• Then the transfer of heat takes place from higher temperature to lower temperature, till an equilibrium condition is attained.
• Since Q is at higher temperature, and the other two are equal, then heat flows from Q to P as well as R.
• Therefore, the direction of flow of heat can be shown as $P\leftarrow Q\rightarrow R$.