Water pipes in hilly areas often burst on a cold frosty night, because
A. The material of which pipes are made contracts due to cold and so breaks
B. Water in the pipes freezes and on freezing water expands, so pipes break
C. Frost makes the pipes rusty, so they break
D. None of these
Answer: Option B
Solution (By Examveda Team)
Water pipes burst because the water inside them expands is it gets close to freezing, and this causes an increase in pressure inside the pipe.Which of the following terms is not used in the field of physics?
A. Latent heat
B. Nuclear fusion
C. Refractive index
D. Stock value
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.
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. Work done in rolling is more than in lifting.
B. Work done in lifting the stone is equal to rolling it.
C. Work done in both is same but the rate of doing work is less in rolling.
D. Work done in rolling a stone is less than in lifting it.
The absorption of ink by blotting paper involves:
A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action

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