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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

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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

  760 mm Hg

  15 mm Hg

  between 745 and 760 mm Hg

  745 mm Hg

  Half-n-half Clue
 

2.

7 bars = _______ Pascals

  70000

  700000

  7e-05

  0.0007

  Half-n-half Clue
 

3.

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

  0.76

  101396

  Half-n-half Clue
 

4.

If a pressure of  7 Pa acts on 5 m2 of area, then the force acting on the surface is

  1.40dynes

  1.40 N

  35dynes

  35 N

  Half-n-half Clue
 

5.

The SI unit of pressure is

  Pascal

  Newton

  Watt

  Joule

  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.

  10000

  1000

  100000

  100

  Half-n-half Clue
 

7.

Barometers modified to measure the height above sea level are called

  manometers

  hydrometers

  sphygmomanometers

  altimeters

  Half-n-half Clue
 

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