What is meant by thermal equilibrium ?

Define a rigid body. What is meant by the term equilibrium ?

What is meant by 'chemical equilibrium ' ?

What is meant by chemical equilibrium? Explain Chemical equilibrium is dynamic in nature.

what do you mean by thermal equilibrium ?

What is meant by 'thermodynamic equilibrium '.

What is meant by producer's equilibrium ? Explain the conditions of producer's equilibrium through the 'total revenue and total cost' approach. Use diagram.