What Factors Affect Absolute Pressure at Lake Depths?

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    Absolute Pressure
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Homework Help Overview

The discussion revolves around calculating the absolute pressure at a lake's maximum depth, given specific parameters such as temperature, barometric pressure, and specific weight of water. The subject area includes fluid mechanics and pressure calculations.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the formula for absolute pressure and attempt to apply it to the given problem. There are questions regarding the correct depth to use in calculations and whether the initial attempts are on the right track.

Discussion Status

The discussion is ongoing, with participants providing feedback on calculations and confirming the use of the correct depth. There is a sense of collaborative exploration as participants check each other's work without reaching a final consensus.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information they can use or the methods they can apply. There are indications of minor errors in initial calculations that are being addressed in the discussion.

Macca1986
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Homework Statement



Calculate Absolute Pressure?
(1) A Lake has average temperature of 10°C and a maximum depth of 35m. The barometric pressure at the lake is 598mmHg. At the deepest part of the lake, determine the absolute pressure in Pascals. Specific weight of the water in the lake 10degreeC is 9.804Kn/m 3


Homework Equations



Pabs = Ps + Density * specific weight * Height

The Attempt at a Solution



598 mmHg = 79.72 KPA

79.72 * 103 PA + ( 1000 kg/m3 * 9.804 * 103 pa/m3 *10 mt)

Pabs = 98 * 106 PA
 
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Welcome to PF!

Hi Macca1986! Welcome to PF! :smile:
Macca1986 said:
79.72 * 103 PA + ( 1000 kg/m3 * 9.804 * 103 pa/m3 *10 mt)

erm :redface: …

35 metres! :rolleyes:​
 
Thanks for the help, silly mistake! :rolleyes:

79.72 * 103 + (1000 * 9.804 * 103 * 35)

=343 * 106 PA

am on the right track?
 
(just got up :zzz:)

looks good! :smile:
 

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