What is meant by positive work ? Give example.

What is meant by negative work ? Give example.

What is meant by promoter ? Give an example.

What is meant by Radiation ? Give example.

What is meant by positive work, negative work and zero work? Give one example of each.

What is meant by positive work, negative work and zero work ? Illustrate your answer with examples of each type.

What is meant by heteroatom ? Give examples.