Why is it difficult to aim and hit targets under water, such as fish?

Why is it difficult to walk on sand?

Why is it difficult to walk on solid ice?

Why is it difficult to climb up a greasy pole ?

A fresh water fish is

Fish are able to see under water because

Explain, why is it difficult for a fireman to hold a hose, which ejects large amount of water at a high velocity?

Why is it so difficult for biologists to agree on a classification of protists?

Bharath went to his grandfather’s house in winter this year. As usual he went for fishing. His grandmother told him there will be no fishes in the lake. He noticed that it was more difficult to find fishes in winter. The fishes were deep inside the river. Whereas in summer they were on the surface and hence he was able to catch fishes. (a) Why are fishes on the surface in water than in the depth in summer? Srisha wanted to keep ice creams without melting. So he had to keep it on ice taken in a container. His grandmother advised him to pour salt on the ice. (a) Why? (b) What value can be derived from this?

"It is difficult to run fast on sand ". Why?

On average, a sharpshooter hits the target once every 3 shots. What is the probability that he will not hit the target until 4th shots?