What are P and Pa in Gage Pressure vs Pa and P?

  • Thread starter Thread starter evotunedscc
  • Start date Start date
  • Tags Tags
    Pressure
AI Thread Summary
Gage pressure is defined as the pressure measurement that excludes atmospheric pressure. In the equation p(gage) = p - pa, "P" represents the absolute pressure, while "Pa" denotes atmospheric pressure. Gage pressure is calculated by subtracting atmospheric pressure from absolute pressure. Atmospheric pressure is typically around 101 kPa. Understanding these definitions is crucial for solving fluid mechanics problems accurately.
evotunedscc
Messages
7
Reaction score
0
Currently I'm in Fluid Mechanics. In a homework problem I'm given the gage pressure inside of a piezometer. In my book there's an equation p(gage) = p - pa . What are the P and the Pa?
 
Physics news on Phys.org
evotunedscc said:
Currently I'm in Fluid Mechanics. In a homework problem I'm given the gage pressure inside of a piezometer. In my book there's an equation p(gage) = p - pa . What are the P and the Pa?

Gage pressure is simply the pressure reading if you exclude atmospheric pressure

in your equation, the gage pressure equals the absolute pressure minus the atmospheric pressure.

atmospheric is usually given around 101 kPa (kilo pascals)
 
Excellent, thanks!
 

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
View full post »

Similar threads

A The effect of perpendicular wind at channel inlet
Replies
12
Views
1K
I Does PYroMat only consider ideal gases?
Replies
5
Views
2K
Explaining Pressure & Depth Relationships in Fluids Using Halliday & Resnick
Replies
4
Views
2K
Calculating work done by a gas
Replies
2
Views
761
What is the relationship between tire size and pressure changes?
Replies
13
Views
979
How to Measure Very Small Differential Pressure in a Subsonic Wind Tunnel
Replies
29
Views
3K
I Lift Force of a Rotating Sphere in the Air
Replies
7
Views
3K
I want to understand this equation - Fluid Mechanics
Replies
3
Views
2K
Understanding Submarine Pressure: Importance and Calculations"
Replies
6
Views
15K
Contact pressure of piston rod onto a surface?
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top