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प्रश्न
Who am I?
I make things hot or cold.
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उत्तर
I make things hot or cold- Temperature
संबंधित प्रश्न
Fill in the blank
The temperature of a normal human body is ________.
Name the S.I. unit of heat and how is it related to the unit calorie?
1 J equals to :
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?
Where am I?
The mean annual temperature is 25°C around me.
Give reason for the following
The electric wire which sag in summer become straight in winter.
Temperature of Srinagar (J&K) is -4°C and in Kodaikanal is 3°C which of them has greater temperature? What is the difference between the temperatures of these two places?
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)
Why are burns caused by steam more painful than those caused by boiling water at the same temperature?
