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प्रश्न
Give a scientific reason for the following:
In winter the birds fluff up their feathers.
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उत्तर
In winter the birds fluff their feathers in order to trap air in their feathers so that the air provides heat insulation to their body from the surroundings and keeps them warm and saves them from winter.
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संबंधित प्रश्न
Explain the following
In winter, water tanks (or ocean) start freezing from the surface and not from the bottom.
Correct the following statement:
The boiling point of water is 273 K.
Why does a piece of ice when touched with hands appear cold?
What do you mean by temperature?
What is evaporation? Why does it cause cooling?
Convert the following temperature into Fahrenheit scale:
1000C
What is temperature?
If the temperature of a liquid in a container is decreased, then the interatomic distance will ______.
Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.
Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.
Assertion: Temperature is the measure of heat energy.
Reason: Energy is the capacity to do work.
