Basics of pressure and pascal's principle

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Discussion Overview

The discussion centers on the principles of pressure in fluids, specifically exploring Pascal's principle and the relationship between applied force, depth, and pressure in a fluid or gas. Participants seek to clarify how these factors interact and influence force transmission within a fluid system.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether an increase in volume and height in a fluid leads to a greater output force due to increased depth, referencing the equation 'P + pgh'.
  • Another participant seeks clarification on the context of the fluid system, asking if it is in a rigid container or a cylinder/piston assembly, suggesting that the configuration may affect force communication.
  • A participant expresses a desire to focus on the underlying principles rather than the specific setup of the fluid system.
  • A link to additional resources on Pascal's principle is provided to aid understanding.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express different levels of clarity and focus on various aspects of the principles involved. There are competing views regarding the implications of depth and the configuration of the fluid system.

Contextual Notes

Participants have not fully defined the assumptions regarding the fluid system's configuration, which may influence the discussion. The relationship between applied force and pressure is not resolved, and the implications of different setups remain unclear.

johndb
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I've being studying fluids and pressure, but want to clarify something. Take a rough example of a force applied on a fluid/gas is it correct to say that from 'P + pgh' one can say that as the volume and height increases or with these increasing layers there is more force been 'packed' behind /generated with the greater depth and from the receiving end a greater output in terms of force with each increase of depth directly vertically below the applied force (ignoring where pressure gauges often channel forces horizontally away and then opposite in direction up an exit pipe which balances forces, e.g. barometer or manometer). In a sense can I say that because of depth, height and pressure an initial input force can increase/multiply because of these factors for a greater output force.
 
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johndb said:
I've being studying fluids and pressure, but want to clarify something. Take a rough example of a force applied on a fluid/gas is it correct to say that from 'P + pgh' one can say that as the volume and height increases or with these increasing layers there is more force been 'packed' behind /generated with the greater depth and from the receiving end a greater output in terms of force with each increase of depth directly vertically below the applied force (ignoring where pressure gauges often channel forces horizontally away and then opposite in direction up an exit pipe which balances forces). In a sense can I say that because of depth, height and pressure an initial input force can increase/multiply because of these factors for a greater output force.

I'm not clear as to what exactly you are asking. Is the fluid in a rigid container, a cylinder/piston assembly, or something else?

CS
 
Well I'm not fussy, can be any of those, (unless of course that changes how the the force is communicated through the fluid/gas) I'm concerned about the underlying principle.
 
johndb said:
Well I'm not fussy, can be any of those, (unless of course that changes how the the force is communicated through the fluid/gas) I'm concerned about the underlying principle.

Perhaps this will help:

http://hyperphysics.phy-astr.gsu.edu/Hbase/pasc.html

CS
 

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