Question 2
Marks : +2 | -2
Pass Ratio : 100%
A U-tube manometer is closed at both ends one end is vacuum and other end has a gas, if the difference in level of mercury is h = 10 mm, what is the pressure of gas?
Explanation: Since the other end of the manometer has vacuum, this means the pressure of gas is equal to the difference in pressure of mercury in both ends, => Pressure of gas = d*g*h = 13.6*9.8*0.01 = 1.33 Pa.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
A closed manometer is filled with 3 fluids first on the left leg with density 8 kg/m3 and length 10 cm, middle one with density 10 kg/m3 and height difference 5 cm more on right leg and the third on the right leg with density 15 kg/m3, what is the length of the third liquid?
Explanation: Pressure on both legs should be equal, => 8*10 = 10*5 + 15*x, => x = 2 cm.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
What is the difference between manometer and differential manometer?
Explanation: Differential manometer has gas in empty space while manometer has a vacuum.