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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
Fill in the blank
Metals are _______ of heat.
Name two substances which expand on heating.
Why are gaps left between successive rails on a railway track ?
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 ?
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.
Why are chimneys provided over furnace in factories?
What are the land and sea breezes? Explain their formation.
The bottom of a cooking utensil is painted black. Give the reason.
The applied heat energy can be realized as an increase in the average kinetic energy of the molecules.
Mention the factors affecting the flow of heat.
