Question :

Radiocarbon is produced in the atmosphere as a result of


A) collision between fast neutrons and nitrogen nuclei present in the atmosphere
B) action of ultraviolet light from the sun on atmospheric oxygen
C) action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D) lightning discharge in atmosphere

Answer : A

Description :



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The absorption of ink by blotting paper involves


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C) diffusion of ink through the blotting
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Light year is a unit of


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Let a thin capillary tube be replaced with another tube of insufficient length then, we find water


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Sound waves in air are


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