Question

Nam
18. Why do telephone wires sag in summer?
in maths​

Answer 1

Answer:

the telephone wire sage in summer because of the expansion

Answer 2

Answer:

The telephone wires will sag in summer due to expansions and will break in winter due to contraction. Therefore, while putting up the wires between the poles, care is taken that in summer they are kept slightly loose so that they may not break in winter due to contraction.