PLEASE READ IT CARFULY . I am confused about the manometer equation in this ques
ID: 1713746 • Letter: P
Question
PLEASE READ IT CARFULY .
I am confused about the manometer equation
in this question how did we get the equation of the pressure difference ( P2-P1 = pgh ) ???
http://www.chegg.com/homework-help/questions-and-answers/apparatus-shown-figure-measures-velocity-center-10-cm-diameter-air-duct-tube-mounted-cente-q4170223
WHY IT DOESN'T WORK IN THE NEXT QUESTION ???
http://www.chegg.com/homework-help/applying-continuity-equation-54-part-air-density-00644-lbm-f-chapter-5-problem-88p-solution-9780470259771-exc
?
Write the formula for pressure difference = (0.7x 1000) (9.81) (0.0067-0.0023) sin 30 151.074 PaExplanation / Answer
In the first problem we have applied the hydrostatic equation. P1-P2=rho * g* h. Which gives the pressure differece.
In the second problem we have applied continutiy equation. A1V1=A2V2.
We need to apply the equations as per our requirement. What we need in the problem and which equation we need to apply that we should understand that's it.