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प्रश्न
Write true or false for a given statement.
Black surfaces are the poor absorbers of heat radiations.
पर्याय
True
False
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उत्तर
False.
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संबंधित प्रश्न
Write true or false for a given statement.
On touching a lump of ice, we feel cold because some heat passes from our body to the ice.
Write true or false for a given statement.
Medium is necessary for the transfer of heat by radiation.
Fill in the blank
Heat transfer in solids is by ______
Select the correct alternative
In the process of convection, heat travel
State the direction of heat transfer by way of convection.
Maximum heat is absorbed by a ______ coloured object.
Conduction of heat takes place through a ______ substance.
How does a fever get lowered by putting a cold compress on the forehead of a patient?
When a liquid boils, energy is absorbed.
Take a sheet of paper. Draw a spiral on it as shown in Figure. Cut out the paper along the line. Suspend the paper as shown in Figure above a lighted candle. Observe what happens. Think of an explanation.
