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[" If an air bubble rises from the bottom "],[" of a mercury tank to the top its volume "],[" becomes "1(1)/(2)" times.When normal "],[" pressure is "76cm" of "H_(8)" then depth of "],[" the "H_(8)" tank is "],[[" 1) "38cm," 2) "132cm],[" 3) "76cm," 4) "49cm]]

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