Why is it difficult to drive on a wet road ?

Why is it difficult to a hold a school bag having a strop made of a then and strong string.

Why is it dangerous to drive on a foggy day ?

Exlpain, why is it difficult for a fireman to hold a hose which ejects large amounts of water at high velocity.

Explain why it is difficult to wash clothes with soap when water is hard. How do detergents help in overcoming this problem?

Why has it been difficult to study the chemistry of radon ?

It is difficult to observe diffraction in case of light because