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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.

5 bars = _______ Pascals

  0.0005

  5e-05

  50000

  500000

  Half-n-half Clue
 

2.

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

  760 mm Hg

  15 mm Hg

  745 mm Hg

  Half-n-half Clue
 

3.

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

  Aneroid

  Anemometer

  Hydrometer

  Manometer

  Half-n-half Clue
 

4.

pressure - manometer
If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 20.0 cm, then the density of oil B of height hB = 40 cm in the U-tube is about

  1.25 g cm-3

  0.80 g cm-3

  3.20 g cm-3

  0.31 g cm-3

  Half-n-half Clue
 

5.

Soap bubbles are spherical in shape because

  soap film has a low surface tension

  air trapped inside the bubble has low pressure

  spherical shape has the highest ratio of surface area to volume

  air exerts equal pressure in all directions

  Half-n-half Clue
 

6.

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.

  10336

  10.336

  101396

  0.76

  Half-n-half Clue
 

7.

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

  1000

  100

  10000

  Half-n-half Clue
 


 
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