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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
The temperature of boiling water is _______
Select the correct alternative
Which of the statement is correct
What do you understand by thermal expansion of a substance ?
Name two substances which expand on heating.
Why are gaps left between successive rails on a railway track ?
Describe one experiment to show that liquids expand on heating.
What are the good and bad conductors of heat ? Give two examples of each.
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
The applied heat energy can be realized as an increase in the average kinetic energy of the molecules.
Explain the following effects of heat.
Expansion
