Describe the characteristics and uses of coal tar

Describe characteristics and uses of coke.

Write the characteristics and functions of steam.

Describe the basic characteristics of a photosystem and explain how photosystem I differs from photosystem II.

State the uses of coal

Write the characteristics of an electromagnetic.

Describe the important characteristics of gymnosperms.

Mention the characteristics of an ideal fuel.

Write three characteristics of physorption.

What are the characteristics of a simple harmonic motion?