Water is pumped up a vertical pipe of uniform area at steady speed. As it rises 10 m, its pressure (rho = 1000, g = 9.8):

  1. rises by 9.8 10^4 Pa
  2. stays the same
  3. falls by 9.8 10^4 Pa
  4. falls by 980 Pa
Answer

C) falls by 9.8 10^4 Pa

Same speed (continuity), so Delta P = -rho gDelta h. SLO P-11-B-40 · Application

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