Very simple question - is pressure 1m down in water.

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Homework Help Overview

The discussion revolves around understanding pressure in a fluid, specifically water, at a depth of 1 meter. Participants are exploring the relationship between pressure, depth, and fluid density, referencing the hydrostatic pressure equation.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the correct application of the pressure equations, particularly whether to use the basic hydrostatic pressure formula or to include atmospheric pressure in their calculations. There is also confusion regarding the notation used for pressure and density.

Discussion Status

Some participants have expressed confusion about the equations and notation, while others have clarified the meaning of symbols used. There is an acknowledgment of the total pressure acting on a body in a fluid, and a comparison to atmospheric pressure has been noted.

Contextual Notes

Participants are grappling with the notation for pressure and density, which has led to some misunderstandings. The discussion reflects a mix of interpretations regarding the equations involved in calculating pressure at a given depth.

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Very simple question - is pressure 1m down in water...

is it pgh?? (1000*9.81*1)...

or is it P2 = P1 + pgh.. that is.. (101.3kPa) + (1000*9.81*1)


im so confused :/
 
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Yes.I'm confused,too,because you used the letter "p" both for pressure (good thing) and for mass volumic density (bad thing)...

Daniel.
 
the small p is rho

and i figured it out :)
its the 2nd eqn
 
Of course,that's the total pressure acting on a body immersed in a fluid.However,you might have noticed it's ~11/10 times larger than the one due to air at Earth's surface,which means a difference of ~0.1 atm due to fluid pressure...

Daniel.
 

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