pressure at 2.5 m below

Classical Mechanics Level 1

Determine the absolute pressure in kilopascal in a body of oil at a point 2.5 2.5 meters below the free surface. Give your answer to two decimal places.

Details:

  1. Atmospheric pressure is 101 K p a 101~Kpa .

  2. Unit weight of water is 9.81 K n / m 3 9.81~Kn/m^3 .

  3. Specific gravity of oil is 0.8 0.8 .


The answer is 120.62.

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1 solution

gauge pressure = unit weight of water x depth from free surface x specific gravity of oil \text{gauge pressure = unit weight of water x depth from free surface x specific gravity of oil}

absolute pressure = gauge pressure + atmospheric pressure = ( 9.81 ) ( 2.5 ) ( 0.8 ) + 101 = 120.62 K p a \text{absolute pressure = gauge pressure + atmospheric pressure} = (9.81)(2.5)(0.8)+101=120.62~Kpa

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