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mouthpiece (plural mouthpieces)
- A part of any device that functions in or near the mouth, especially of a telephone or musical instrument
- A spokesman who speaks on behalf of someone else
- (slang) A lawyer for the defense
Ajet of water from a 25 mm diameter nozzle is directed vertically upwards. Assuming that the jet remains circular and neglecting any loss of energy, that will be the diameter at a point 4.5 m above the nozzle, if the velocity with which the jet leaves the nozzle is 12 m/s.