Question

5. Why do different substances of the same
volume have different masses?

6. It is more convenient to store 100 kg of
steel than 100 kg of cotton. Explain why.

7. What are the SI and common units of
density? Write the relation between them.

8. What do you understand when we say that
the density of copper is 8.9 g/cm?

9. Define speed. Write its SI unit.

Answer 1

Answer:

Your answer is given in the above attachment.

Explanation:

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Answer 2

Explanation:

Equal volumes of different substances have different masses. For example, the mass of iron is much more than the mass of an equal volume of wood. This is because the particles of iron are more closely packed than those of the wood. to other words, iron is denser than wood.