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Why does the electric wire become loose in summers?
The metal wires expand in the heat - making them sag.
Why do metallic wires sag in summer?
They expand with heat.
What would happen if the telephone wires were made tight in summers and then it went cold?
so it can survive
Telephone lines are allowed to sag when they are hung Why?
The less sag you want, the more force would be required to pull the wire.
How do you know when to bend the glass tube?
When the heated glass first begins to sag.
Why metal wires sag in summers?
They expand with heat.
Why does the electric wire become loose in summers?
The metal wires expand in the heat - making them sag.
Why do metallic wires sag in summer?
They expand with heat.
What happenes to telephone wires when they expand with heat?
became sag loosen
What are the advantages of hydraulic brake compared to wires and pulleys?
Wires stretch and sag. Hydraulic fluids transfer force with far smaller losses.
Why are electricity wires connected to poles with a sag between it?
Two reasons: 1. It almost impossible to pull a wire tight enough that it is straight. 2. The sag also can "give" a little if the wires shrink to to cold. If they could not "give" a little, then they would simply break.
Why do wires tighten up at night?
At night, there is no sun, thus there is no heat. When there is no heat, solids contract. The wires, being solids contract at night and in the morning, when there is heat, they sag.
Why do wires look different during the day and at night?
At night, there is no sun, thus there is no heat. When there is no heat, solids contract. The wires, being solids contract at night and in the morning, when there is heat, they sag.
What would happen if the telephone wires were made tight in summers and then it went cold?
so it can survive
Why is it advisable to allow telephone wires to sag between poles?
because telephone wires might contract and may eventually snap during cold days. hence, it is advisable to allow them to sag during summer days to allow contraction for cold days. -Hadisa Nuddin
Why don't train wires sag when electricity flows through them?
because electricity has no mass and therefore no weight. electricity is not a physical object
What is to hang or sink downward?
sag
