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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.

Barometers modified to measure the height above sea level are called

  altimeters

  hydrometers

  sphygmomanometers

  manometers

  Half-n-half Clue
 

2.

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

  essentially vacuum

  filled with water

  filled with nitrogen

  filled with air

  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.

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 = 4 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

  1.018 × 107dynes cm-2

  1.066 × 106dynes cm-2

  1.088 × 104dynes cm-2

  5.331 × 104dynes cm-2

  Half-n-half Clue
 

5.

Which is the 'odd one out'?

  mm Hg

  bar

  N

  Pa

  Half-n-half Clue
 

6.

The SI unit of pressure is

  Joule

  Pascal

  Watt

  Newton

  Half-n-half Clue
 

7.

1 Pascal = 1 _______ m-2

  Newton

  Erg

  Dyne

  Joule

  Half-n-half Clue
 


 
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