Advertisements
Advertisements
प्रश्न
Why is a newly made quit warmer than an old one?
उत्तर
A newly made quilt is warmer than an old one because the cotton in the old quilt gets compressed and very little air will remain trapped in it, hence heat insulation is quite poor.
APPEARS IN
संबंधित प्रश्न
When a substance having mass 3 kg receives 600 cal of heat, its temperature increases by 10∘C. What is the specific heat of the substance?
What causes a change in the temperature of a body?
What is a bimetallic strip?
Convert the following temperature into Fahrenheit scale:
1000C
The following figure shows a container in which a lighted candle has been kept. The container has two openings, p, and Q. Which way the smoke from an external source placed near P moves when it reaches P and leaves from Q. Give a reason for your answer.
Find the final temperature of a copper rod. Whose area of cross-section changes from 10 m2 to 11 m2 due to heating. The copper rod is initially kept at 90K. (Coefficient of superficial expansion is 0.0021 /K)
The Kelvin is the basic unit of ______.
What is the concept of temperature?
Give reasons why –
chimneys are located high up in kitchens and factories
