Hydraulics and Fluid Mechanics in ME
In an immersed body, center of pressure is

below be center of gravity
at the center of gravity
above the center of gravity
could be above or below e.g. depending on density of body and liquid

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Hydraulics and Fluid Mechanics in ME
If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be

from reservoir B to reservoirs C and A
from reservoir A to reservoirs B and C
unpredictable
from reservoir C to reservoirs A and B

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