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An empty barometric tube 1 m long is lowered vertically (mouth downwards) into a tank of water. What will be the depth above the water level in the tube, when the water has risen 20 cm inside the tube ? Take atmospheric pressure as 10.4 m column of water. |
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Answer» Correct Answer - `2.6 m of water column` Let 1 sq. Cm be teh area of cross section of the barometric tube. Here, `P= 10.4m` of water `V = 100 xx 1 = 100 c.c.,` `P_(1) = ? , V_(1) = (100-20) = 80 c.c.` As, `P_(1) = PV//V_(1) = 10.4 xx 100//80` `=13 cm` of water column. `:.` Depth of water level `=P_(1)-P` `= 13 = 10.4 = 2.6 m` of water column |
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