Because of viscosity, a real fluid flowing through a pipe:

  1. has zero pressure drop
  2. speeds up without a pump
  3. gains energy
  4. loses some mechanical energy as heat
Answer

D) loses some mechanical energy as heat

A pressure difference is needed to keep it moving. SLO P-11-B-41 · Understanding

Physics MCQ · More Fluid Statics and Dynamics MCQs · Practise