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प्रश्न
Why do telephone wires sag during summer?
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उत्तर
Telephone wires sag in summer because due to heat of the sun, the wire expands and increases in length, thus they sag in summer.
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संबंधित प्रश्न
Fill in the blank
The S.I. unit of temperature is ________.
Define one joule of heat.
Two bodies are at same temperature. Do they necessarily contain same amount of heat?
Define coefficient of linear expansion.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.
Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
Where am I?
The mean annual temperature around me is 10°C.
Higher Order Thinking question
Go to a veterinary doctor (a doctor who treats animals). Discuss and find out the normal temperature of domestic animals and birds.
If the temperature of a liquid in a container is decreased, then the interatomic distance will ______.
State whether true or false. If false, correct the statement.
One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K.
______ determines the direction of the flow of heat.
