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Question

The mass of the liquid flowing per second per unit area of cross section of the tube if proportional to Px and vy, where P is the pressure difference and v is the velocity then the relation between x and y is

A
x=y
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B
x=y
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C
y2=x
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D
y=x2
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Solution

The correct option is B x=y
Given mαPx×Vy
[ML2T0]=[ML1T2]x[M0LT1]y
x=1 } Comparing coefficients
2=x+y and 1=2xy
2=4x2y
0=(4x2y)(x+y)
0=3x3y
3x=3y x=y.

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