This is a sealed pipe with the vertical tubes open at the top. It is filled with

Question

This is a sealed pipe with the vertical tubes open at the top. It is filled with liquid to a height H in the tube on the left side. If the fluid is stationary, the height of the liquid in the tube on the right side is: A B C Next, the ends of the pipe at the bottom are open, and fluid flows from left to right. If the height of the fluid in the tube on the left is H, then the height of the fluid in the tube on the right is A B C Next, the fluid flows from right to left in the pipe. If the height of the fluid on the tube on the left is H, then the height of the fluid in the tube on the right is A B C

Explanation / Answer

First case
B since the pressure on both side will be same since there is no fluid flow

Total pressure P=Pstatic + Pdynamic (depends on velocity) [ CONSTANT]
Second case:

On fluid flow velocity at rigt tube increases due to decrease in area (continuity of flow theorem a1v1=a2v2)

since velocity increases and dynamic pressure increases so static pressure decreases (since total P is const)

So C (static pressure decreased)

Third case:

fliud flow from right to left so area is increased so velocity decreased in left side hence static pressure

is higher in left side compared to right( reason given above theory)

since hight on leht is H hight on right should be lower

So C

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