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What will be the length of mercury colum...

What will be the length of mercury column in a barometer tube, when the atmospheric pressure is 76 cm of mercury and the tube is inclined at an angle of `30 ^(@)` with the horizontal direction ?

Text Solution

Verified by Experts

Here, h=76 cm `theta=30^(@)`
If l is the length of mercury column is the barometer tube then
`(h)/(l)=sin 30^(@) implies (76cm)/(l)=(1)/(2)`
`implies " " l=2xx76=152 cm`
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Knowledge Check

  • A thin tube of uniform cross-section is sealed at both ends. It lies horizontally, the middle 5 cm containing mercury and the two equal end containing air at the same pressure P. When the tube is held at an angle of 60^@ with the vetical direction, the length of the air column above and below the mercury column are 46 cm and 44.5 cm respectively. Calculate the pressure P in centimeters of mercury. (The temperature of the system is kept at 30^@C ).

    A
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    B
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    C
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