A steady flow of water passes along a horizontal tube from a wide section $X$ to the narrower section $Y$, see figure. Manometers are placed at $P$ and $Q$ at the sections. Which of the statements $A, B, C, D, E$ is most correct?
  • Awater velocity at $X$ is greater than at $Y$
  • Bthe manometer at $P$ shows lower pressure than at $Q$
  • Ckinetic energy per $m^3$ of water at $X$ = kinetic energy per $m^3$ at $Y$
  • Dthe manometer at $P$ shows greater pressure than at $Y$
Diffcult
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