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प्रश्न
Write true or false for a given statement.
Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Write true or false for a given statement.
A mercury thermometer makes use of the property of the expansion of liquids on heating.
Write true or false for a given statement.
Water is a bad conductor of heat.
Fill in the blank
Black and dull surfaces 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.
Why do telephone wires sag in summer ?
Iron rims are heated before they are fixed on the wooden wheels. Explain the reason.
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
In summer, ice is kept wrapped in a gunny bag. Explain the reason.
Why is an oven made of double walls with the space in between filled with cork ?
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
