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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.

If a pressure of  6 Pa acts on 5 m2 of area, then the force acting on the surface is

  1.20 N

  30dynes

  30 N

  1.20dynes

  Half-n-half Clue
 

2.

1 Pascal = 1 _______ m-2

  Erg

  Newton

  Dyne

  Joule

  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.

  10.336

  0.76

  10336

  101396

  Half-n-half Clue
 

4.

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

  745 mm Hg

  760 mm Hg

  between 745 and 760 mm Hg

  15 mm Hg

  Half-n-half Clue
 

5.

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 = 3 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

  1.017 × 107dynes cm-2

  1.074 × 104dynes cm-2

  3.998 × 104dynes cm-2

  1.053 × 106dynes cm-2

  Half-n-half Clue
 

6.

What instrument is used for measuring atmospheric pressure?

  Sphygmomanometer

  Barometer

  Hygrometer

  Hydrometer

  Half-n-half Clue
 

7.

4 bars = _______ Pascals

  4e-05

  400000

  0.0004

  40000

  Half-n-half Clue
 


 
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