Two circular pipes A & Bboth containing water but at different pressures. They are connected by the means of a

Two circular pipes A & Bboth containing water but at different pressures. They are connected by the means of an inverted U-tube, which contains oil with the density of 800kg/m^3. The heights are Ha=7, Hb=20,Hc=13. What is the pressure difference(Pb-Pa)?

Hi Nina,


I am french ( Boulogne sur mer 62200 - FRANCE)


I tried to imagine the schema.
I give the method and calculations based on this schema.
I hope you know correct by yourself to the case where I would have made an error.


. . . . . . . I . . . I . . . . . . . . . . I . . . .I
. . . . . . . I . . . I . . . . . . . . . . I . . . .I
. . . . . . . I . . . I . . . . . . . . . . I____I C
. . . . . . . I . . . I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . I
. . . . . . . I . . . I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . I Ha
. . . . . A. I___ I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I . . alcohol. . . . . . . . . .I Hb . . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . . . . . I Hc
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I.aaa.I. . . . . . . . . . . . . . . . . .I . . . . . . . . . . . . I
. . . . . . . I.ww.I . . . . . . . . . . I____I B. . . . . . . . . . . . . . . . I . . . . . . . . . . . . I
.water. . I.ww.I . . . . . . . . . . I.w.w.I
. . . . . . . I.ww.I . . . . . . . . . . I.w.w.I
. . . . . . . I.ww.I . . . . . . . . . . I.w.w.I
. . . . . . . I.ww.I . . . . . . . . . . I.w.w.I
. . . . . . . I.ww.I_ _ _ _ _ _ _ I.w.w.I
. . . . . . . I.wwwwwwwwwwwwww.I
. . . . . . . I.wwwwwwwwwwwwww.I
. . . . . . . ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

Pa = Pc = Patm = 101325 Pa

Pb - Pa = ρ(water) x g x Hc
Pb - Pa = 1000 x 9,81 x 0,13 = 1275,3 Pa


I hope to have answered your question.
.

I am sorry Nina, but I did not give my address mail in Yahoo Q/R.

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