The column of mercury in a barometer is 76mm of Hg. Calculate the atmospheric pressure if the density of mercury = 13600kgm−3. (Take g=10ms−2)
A
1.03×105 Pa
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B
1.03×103 Pa
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C
1.03×104 Pa
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D
1.03×106 Pa
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Solution
The correct option is A1.03×106 Pa Accordingtoquestion:Pressure=hpg|h=76cm=0.76m⇒P=13.6×103kg/m3,g=10m/s2so,⇒P=0.76×3.6×103×10∴1.03×105PasothatthecorrectoptionisA.