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

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Hydraulics and Fluid Mechanics in ME
When an ideal fluid flows past a sphere

lowest pressure intensity occurs at front stagnation point
total drag is zero
lowest pressure intensity occurs at rear stagnation point
highest intensity of pressure occurs around the circumference at right angles to flow

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