- #1
rbmartel
- 4
- 2
- Homework Statement
- The figure shows the situation in which two fluids (liquids I and II), with densities ρI and ρII, are separated by a rigid plate of height H, supported on a frictionless base. In order for the plate to be on equilibrium on the rigid plate, the ratio between the densities of the liquids must be ρI / ρII. = ?
Hey guys, in order to find ρI / ρII, should I use:
ρI.g.H1 = ρII.g.H2 (P1 = P2)
or
ρI.g.H1.H1.c = ρII.g.H2.H2.c (P1A1 = P2A2)
- Relevant Equations
- ρI.g.H1 = ρII.g.H2 (P1 = P2)
ρI.g.H1.H1.c = ρII.g.H2.H2.c (P1A1 = P2A2)
I used P1A1 = P2A2 and my professor said that P1=P2 is correct, but some sources on the internet say that P1A1=P2A2 is correct, just like I did, but unfortunately no one explains why one or the other is the correct answer.
For P1A1 = P2A2 you get ρI / ρII = 1/4 and for P1=P2 you get ρI / ρII = 1/2.
For P1A1 = P2A2 you get ρI / ρII = 1/4 and for P1=P2 you get ρI / ρII = 1/2.