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School Physics Quiz : Pressure


Answer the following questions based on the change of state and latent pressure.

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Multiple choice

Your Performance  

1.

pressure - barometer
Air is trapped in the space (labeled A) above the mercury level in the tube of a barometer, which measures 745 mm Hg. If the atmospheric pressure is 760 mm Hg, then the pressure of the trapped air is

  between 745 and 760 mm Hg

  745 mm Hg

  760 mm Hg

  15 mm Hg

  Half-n-half Clue
 

2.

pressure - manometer
One arm of a glass U-tube is open to the atmosphere, whereas the other vertical arm is connected to a gas supply. The difference in levels of mercury (density = 13.6 g cm-3) between the vertical arms of the U-tube manometer is h = 1 cm. If the atmospheric pressure is 760 mm Hg and the gravitational acceleration is 9.8 m s-2, then the pressure of the gas is about

  1.047 × 104dynes cm-2

  1.014 × 107dynes cm-2

  1.333 × 104dynes cm-2

  1.026 × 106dynes cm-2

  Half-n-half Clue
 

3.

If a pressure of  7 Pa acts on 2 m2 of area, then the force acting on the surface is

  14 N

  3.50dynes

  14dynes

  3.50 N

  Half-n-half Clue
 

4.

pressure - barometer
To measure the atmospheric pressure, the space (labeled A) above the mercury level in a barometer tube is

  essentially vacuum

  filled with air

  filled with nitrogen

  filled with water

  Half-n-half Clue
 

5.

6 bars = _______ millibars

  0.6

  60

  0.006

  6000

  Half-n-half Clue
 

6.

If the average atmospheric pressure at sea level can support 10.34 m of vertical length of a water column, then its magnitude is about _______ Pa.
Assume density of water = 1 g cm−3 and gravitational acceleration = 9.8 m s−2.

  100000

  10000

  100

  1000

  Half-n-half Clue
 

7.

pressure - manometer
If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 26.6 cm, then the density of oil B of height hB = 50 cm in the U-tube is about

  0.33 g cm-3

  0.85 g cm-3

  1.18 g cm-3

  3.01 g cm-3

  Half-n-half Clue
 


 
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