Telephone wires are laid a little loose in summer and a little tight in winter. Why?

Telephone wires are kept tight between two poles in summer

Statements given below are incorrect. Write the correct statements. When telephone wires are laid in summer, they are kept tight to prevent from sagging down.

"In scooters more viscous mobile oil is used in summer than in winter". Why?

Telephone lines are laid in different ways in winter and summer. Explain.

Why do the pendulum clocks go slow in summer and fast in winter?

Why are frogs not to be seen during peak summer and winter

"The dynamic friction is a little less than the limiting friction ". Why ?

Our foodstuffs become unfit for human consumption more quickly in summer than in winter. Why?

Why do telephone wires sag in summer ?

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?