Calculating Pressure Difference in Two Tanks

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SUMMARY

The discussion focuses on calculating the pressure difference between two tanks containing SAE Grade 30 oil and carbon tetrachloride using a differential manometer. The densities of the fluids are 890 kg/m³ for SAE Grade 30 oil and 1,590 kg/m³ for carbon tetrachloride. The pressure difference is calculated using the formula P = Po + pgh, resulting in a pressure difference of 2871.4 Pa. The user inquires about the validity of using Torr for pressure difference calculations, indicating a need for clarification on fluid mechanics principles.

PREREQUISITES
  • Understanding of fluid density and its impact on pressure calculations
  • Familiarity with the principles of hydrostatics
  • Knowledge of differential manometers and their applications
  • Basic understanding of pressure units (Pa, Torr, atm)
NEXT STEPS
  • Study the hydrostatic pressure equation in detail
  • Learn about the operation and application of differential manometers
  • Explore the conversion between pressure units, specifically between Torr and Pascal
  • Investigate the effects of fluid density on pressure measurements in various fluids
USEFUL FOR

Students in fluid mechanics, engineers working with fluid systems, and anyone involved in pressure measurement and analysis in tanks or similar applications.

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Homework Statement


Two tanks, one containing SAE Grade 30 oil (density of 890 kg/m3) and the other containing carbon tetrachloride (density of 1,590 kg/m3) , are connected through a differential manometer as shown in the figure. Calculate the pressure difference between chambers A and B.
Pressure_5.jpg: http://www.imageupload.org/thumb/thumb_8614.jpg



Homework Equations


760mm Hg = 760Torr. 760Torr = 1atm = 101300Pa.
P= Po + pgh


The Attempt at a Solution


The pressures are the same if there would have been no height difference.
Thus PA=890*1.1*9.8
and PB=1590*0.8*9.8
PB-Pa=2871.4 Pa.
This correct?
Quick question. why can't I use 0.3*300Torr to solve for pressure difference?
new to fluids.
 
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