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A cylindrical tube with its base as show...

A cylindrical tube with its base as shown is filled with water. It is moving down with a constant acceleration a along a fixed inclined plane with angle `theta = 45^0` P1 and P2 are pressure points 1 and 2 resp located at base of tube. Let `beta = (P1 - P2)/(rho g d)`. Which statement is true?

A

` beta = 0` when `a = g/sqrt(2)`

B

` beta gt 0` when `a = g/sqrt(2)`

C

` beta = (sqr(2)-1)/sqrt(2)` when `a = g/2`

D

` beta = 1/sqrt(2)` when `a = g/2`

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