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Consider the graph below showing water pressure as a function of position in a pipe.

Suzanne Taylor. Created for Albert.io. Copyright 2016. All rights reserved.

Which of the following options could explain the change in pressure with position, $x$? Select ALL that apply.

A

The flow speed increases as $v \propto x$

B

The flow speed decreases as $v\propto \sqrt{-x}$

C

The pipe is straight but angled downwards

D

The pipe curves upwards

E

The diameter of the pipe increases linearly with position

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