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प्रश्न
Why is the outer coat of the penguins of Antarctica black?
उत्तर
Black is a good absorber or trapper of heat. So, in cold regions like Antarctica, the black outer coating of penguins helps them to absorb as much heat from the surroundings and keep their bodies warm.
संबंधित प्रश्न
Give two examples each of conductors and insulators of heat.
A wooden spoon is dipped in a cup of ice cream. Its other end ______.
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 liquids and gases is by ________.
Select the correct alternative
Heat in a liquid is transferred by
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
Explain briefly the process of heat transfer by radiation.
______ of heat does not require a medium.
What are the modes of heat transfer?
When ice changes into a liquid, it absorbs energy.
