One litre of ideal gas is conpressed iso...

One litre of ideal gas is conpressed isothermally at 0.72m of Hg-column so that its volume becomes 0.9 litre. Find its stress, if the mercury is `13.6 xx 10^(3) kg//m^(3)`.

8cm of Hg

7cm Hg

6cm of Hg

4cm of Hg

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