A narrow uniform glass tube 80 cm long and open at both ends is half immersed in mercurry. Then the top of the tube is closed and it is taken out of mercury. A column of mercury 22 cm long then remains in the tube. What is the atmospheric pressure?

A glass tube 80 cm long and open ends is half immersed in mercury. Then the top of the tube is closed and it is taken out of the mercury. A column of murcury 20 cm long then remains in the tube. The atmospheric (in cm of Hg) is (assume temperature to be constant )

A glass tube 80 cm long and open ends is half immersed in mercury. Then the top of the tube is closed and it is taken out of the mercury. A column of murcury 20 cm long then remains in the tube. The atmospheric (in cm of Hg) is (assume temperature to be constant )

A tube 1.5 m long and closed at on end is half filled with mercry and is then inverted with its open ends just dipping into a mercury tough.Find the height of mercury in the tube if the reading of the barometer is 0.75 m.

A narrow uniform glass tube contains air enclosed by 15 cm long thread of mercury. When the tube is vertical with open end uppermost, the air column is 30 cm long. When the tube is inverted, the length of air column becomes 45 cm. Calculate the atmospheric pressure.