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The atmospheric pressure is measured with a Fortin's barometer having a Vernier scale whose 20 divisions coincide with 19 divisions of main scale. Each division of main scale is equal to 0.5mm. Which of the following correctly expresses the atmospheric pressure? 1) 75.0050 cm of Hg 2) 75.005 cm of Hg 3) 75.00 cm of Hg 4) 71.05 cm of Hg


The atmospheric pressure is measured with a Fortin's barometer having a Vernier scale whose 20 divisions coincide with 19 divisions of main scale. Each division of main scale is equal to 0.5mm. Which of the following correctly expresses the atmospheric pressure?

1) 75.0050 cm of Hg
2) 75.005 cm of Hg
3) 75.00 cm of Hg
4) 71.05 cm of Hg


Grade:9

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