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प्रश्न
Who am I?
Land and water get heated due to me.
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उत्तर
Sunrays
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?
Name two substances which contract on heating.
Define heat energy on a conventional basis.
Define coefficient of linear expansion. Write its SI unit.
Is conduction possible in vacuum?
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.
Give reason for the following
The electric wire which sag in summer become straight in winter.
Give reasons why –
a steam burn is more damaging than a burn caused by boiling water at the same temperature.
Give reasons why –
an igloo is built as a winter shelter
