A barometer tube reads 76 cm of mercury. If | vedclass

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(A) The vertical height $h$ of the mercury column in a barometer remains constant regardless of the inclination of the tube,as it is determined by the

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$152$

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(A) The vertical height $h$ of the mercury column in a barometer remains constant regardless of the inclination of the tube,as it is determined by the atmospheric pressure.Given,the vertical height $h = 76 \ cm$.When the tube is inclined at an angle $	heta = 60^\circ$ with the vertical,the length of the mercury column $l$ along the tube is related to the vertical height $h$ by the formula:$h = l \cos 	heta$Substituting the given values:$76 = l \cos 60^\circ$$76 = l 	imes \frac{1}{2}$$l = 76 	imes 2 = 152 \ cm$.Therefore,the length of the mercury column will be $152 \ cm$.

$A$ barometer tube reads $76 \ cm$ of mercury. If the tube is gradually inclined at an angle of $60^\circ$ with the vertical,keeping the open end immersed in the mercury reservoir,the length of the mercury column will be ........ $cm$.

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