Pressure problem(Fluid mechanic)

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    Mechanic Pressure
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SUMMARY

The discussion focuses on a fluid mechanics problem involving pressure calculations in a tank containing oil and water. The key equation used is P = ρgh, where pressure (P) is determined by the density (ρ), gravitational acceleration (g), and height (h) of the fluid column. The user attempts to calculate the total pressure at the bottom of the tank by summing the contributions from the gas above the oil, the oil itself, and the water, but struggles to achieve the correct answer of 1.4m for part A. Additionally, the user seeks guidance on determining the pressure at the water/Hg boundary and its equivalent height in mercury (Hg).

PREREQUISITES
  • Understanding of fluid statics and hydrostatic pressure
  • Familiarity with the equation P = ρgh
  • Knowledge of gauge pressure and its application in fluid mechanics
  • Basic concepts of pressure measurement using mercury (Hg) columns
NEXT STEPS
  • Study the principles of hydrostatic pressure in multi-fluid systems
  • Learn about gauge pressure vs. absolute pressure in fluid mechanics
  • Research methods for calculating pressure at fluid interfaces
  • Explore the relationship between pressure and height in mercury barometers
USEFUL FOR

Students and professionals in engineering, particularly those specializing in fluid mechanics, as well as anyone involved in solving pressure-related problems in tanks containing multiple fluids.

Rito3d03
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1. Homework Statement

enclosed, thanks for checking

2. Homework Equations

P = ρgh

3. The Attempt at a Solution

I have try to add up all pressure in the tank
(including gauge pressure, pressure of the oil(ρg*0.5), pressure of the water(ρg*0.8))
but still can't balance out the equation since the answer of part A is 1.4m

also, I don't have any clue about part B

thanks if anyone can give me any help
 

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Let's see you working. In terms of depth of water, how much pressure at the bottom of the tank comes from:
- The gas above the oil
- The oil
- The water in the tank?

For B:
- what is the pressure at the water/Hg boundary?
- what height of Hg is that equivalent to?
 

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