The velocity of a pressure wave in water hammer is equal to the velocity of sound in water. Is this statement correct ?

- 1
  
  No, because, the elasticity of the pipe reduces the velocity of the pressure wave
- 2
  
  No, because, the elasticity of the pipe increases the velocity of the pressure wave
- 3
  
  Yes, because, the pipe is much more rigid than water
- 4
  
  yes, because the pressure disturbances always propagate with the velocity of sound

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