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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 - 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 = 5 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

  1.102 × 104dynes cm-2

  1.080 × 106dynes cm-2

  6.664 × 104dynes cm-2

  1.020 × 107dynes cm-2

  Half-n-half Clue  
 

2.

The average atmospheric pressure at sea level is 760 mm Hg. If the relative density of mercury is 13.6, then the air pressure can support _______ m of vertical length of a water column at sea level.

  0.76

  101396

  10336

  10.336

  Half-n-half Clue  
 

3.

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

  15 mm Hg

  760 mm Hg

  between 745 and 760 mm Hg

  745 mm Hg

  Half-n-half Clue  
 

4.

_______ is a type of barometer that consists essentially of a thin metal box exhausted of air.

  Manometer

  Aneroid

  Anemometer

  Hydrometer

  Half-n-half Clue  
 

5.

pressure - manometer
If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 15.0 cm, then the density of oil B of height hB = 30 cm in the U-tube is about

  0.80 g cm-3

  1.25 g cm-3

  3.20 g cm-3

  0.31 g cm-3

  Half-n-half Clue  
 

6.

pressure measurement
A _______ measures the pressure in terms of the difference in fluid levels between the vertical arms of a glass U-tube.

  Barometer

  Manometer

  Sphygmomanometer

  Hydrometer

  Half-n-half Clue  
 

7.

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

  filled with water

  filled with nitrogen

  filled with air

  essentially vacuum

  Half-n-half Clue  
 


 
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