Question

Explain how heat is transferred between a hot and a cold object by conduction.

Answer 1

This is second thermodynamic principle.
Principle has no proof and explanation principle base on observations.

Answer 2

heat transfer from the hot to the cold body is similar to the ohms law in the electricity. the temperature difference between them is analogous to the potential difference in electricity.

rate of heat flow is analogous to the current flow in the electricity.

\[dq/dt=\kappa * A* DT/L\]

A is the area of contact of the two objects and L is the length of the contact making object