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संबंधित प्रश्न
What must be the temperature in Fahrenheit so that it will be twice its value in Celsius?
Define temperature and write its S.I. unit.
1 J equals to :
State the types of thermal expansion. What is the relation between α and γ?
Give a scientific reason for the following:
It is better to use thin blankets to keep the body warm rather than using a single blanket of thickness equal to their combined thickness.
Explain the following:
Why is the cooling in a refrigerator kept near the top?
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.
Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
Give reason for the following
The electric wire which sag in summer become straight in winter.
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)
Define absolute zero.
