Physics 2003 JAMB Past Questions - Question 17: Thermal equilibetrium bween two objects when

Correct Answer

A

Explanation

Thermal equilibrium between two objects occurs when they have the same temperature, and there is no net flow of heat between them. In other words, the two objects are in a state of thermal balance. When two objects are in thermal equilibrium, they have reached a point where their temperatures are equal, and there is no further transfer of heat from one to the other.

The concept of thermal equilibrium is an important principle in thermodynamics and is used to describe how heat is transferred between objects. When two objects are in thermal equilibrium, there is no temperature difference, so there is no heat transfer between them. This principle is described by the zeroth law of thermodynamics, which states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other.

Thermal equilibrium is often achieved when objects are in contact with each other for a sufficient amount of time and allowed to exchange heat until their temperatures are the same. The exact time it takes for two objects to reach thermal equilibrium depends on factors such as their sizes, thermal conductivities, and temperature differences.

In practical terms, if you have two objects and you want to bring them into thermal equilibrium, you can place them in contact with each other, and over time, they will reach the same temperature. You can use a thermometer to confirm when they have achieved thermal equilibrium by observing that their temperatures are the same.