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प्रश्न
Write true or false for a given statement.
Telephone wires are kept tight between the two poles in summer.
विकल्प
True
False
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उत्तर
False.
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संबंधित प्रश्न
Write true or false for a given statement.
Land and sea breezes are convection currents of cold and warm air.
Fill in the blank
On heating a body, its temperature _______.
Fill in the blank
We use a ________ for measuring the temperature of a body.
Fill in the blank
Metals are _______ of heat.
The fig. shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.
Iron rims are heated before they are fixed on the wooden wheels. Explain the reason.
Describe an experiment to show that air expands on heating.
Explain why the water pipes are covered with cotton during very cold weather.
Why are chimneys provided over furnace in factories?
Explain the following effects of heat.
Expansion
