Question

a.
5. What causes sagging of electric wires during summer?
Expansion
b. Contraction
Both expansion and contraction
d.
Neither expansion nor contraction
C.​

Answer 1

Answer:

expansion ....................

Answer 2

Answer:

get the answer here

Explanation:

They expand due to summer heat and contract due to winter cold. C ... If they were hung loosely in the winter, then in summer the cables would sag far too much. An engineer ... Thermal Expansion and Contraction.