Q.

A mercury barometer reads 75 cm in vertical position. If the tube is inclined by 600 to the vertical, the length of the mercury in the tube will be

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a

112.5 cm

b

75 cm

c

37.5 cm

d

150 cm

answer is D.

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Detailed Solution

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cos 600 = hl

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or l = hcos 600 = 7512cm = 150 cm

The vertical height of mercury level in a barometer does not change.

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