Answer
To read the gas pressure in the bulb, one must calculate the difference in height of the Hg between the two arms of the manometer. This is because the gas pressure in the bulb in mm Hg will be equal to this difference.
Work Step by Step
To read the gas pressure in the bulb, one must calculate the difference in height of the Hg between the two arms of the manometer. This is because the gas pressure in the bulb in mm Hg will be equal to this difference.