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प्रश्न
Give a scientific reason for the following:
Old quits are less warm than the new ones.
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उत्तर
Old quilts are less warmer than new ones because the cotton in the old quilt gets compressed and very little air will remain trapped in it, hence heat insulation is quite poor
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संबंधित प्रश्न
Fill in the blank
The temperature of a normal human body is ________.
What is the Celsius scale of temperature ?
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
Name two substances which contract on heating.
Why does a substance expand on heating?
Who am I?
Land and water get heated due to me.
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.
If a substance is heated or cooled, the change in mass of that substance is
