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A barometer gives wrong readings because some air is present above the mercury column. At a pressure of P_{01}=755mm of Hg the barometer shows P_1=748mm and at P_{02}=740mm it shows P_2=736mm. Then the length l of the barometer tu |
| Answer» A barometer gives wrong readings because some air is present above the mercury column. At a pressure of P_{01}=755mm of Hg the barometer shows P_1=748mm and at P_{02}=740mm it shows P_2=736mm. Then the length l of the barometer tu | |