B75 A liquid flows steadily through two pipes, A and B, which dre joined end to end and whose internal radii are i and 2r respectively. If B is 8 times longer than A and the pressure differ- ence between the ends of the composite pipe is 9000 Nm, what is the pressure difference across A?

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B75 A liquid flows steadily through two pipes, A
and B, which dre joined end to end and whose
internal radii are r and 2r respectively. If B is 8
times longer than A and the pressure differ-
ence between the ends of the composite pipe is
9000 Nm, what is the pressure difference
across A?
Transcribed Image Text:B75 A liquid flows steadily through two pipes, A and B, which dre joined end to end and whose internal radii are r and 2r respectively. If B is 8 times longer than A and the pressure differ- ence between the ends of the composite pipe is 9000 Nm, what is the pressure difference across A?
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