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प्रश्न
Fill in the blank
Black and dull surfaces are ______ of heat.
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उत्तर
Black and dull surfaces are good absorbers of heat.
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संबंधित 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.
Write true or false for a given statement.
Equal volumes of different liquids expand by different amounts when they are heated to the same rise in temperature.
Fill in the blank
In a thermometer, the commonly used liquid is _______
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Liquids expand _______ than the solids.
Why do telephone wires sag in summer ?
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Describe one experiment to show that liquids expand on heating.
Describe an experiment to show that air expands on heating.
What are the good and bad conductors of heat ? Give two examples of each.
Why is an oven made of double walls with the space in between filled with cork ?
