A thread of mercury of length 20 cm is used to trap some air in a capillary tube with uniform cross-sectional area and closed at one end. With the tube vertical and the open end uppermost, the length of the trapped air column is 15 cm. Calculate the length of the air column when the tube is held: i. horizontally; ii. vertically with the open end underneath. [Atmospheric pressure = 76 cmHg].?
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Asked by Kosisochukwu on 5th January, 2020
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