Fluid Mechanics
Path followed by water jet issuing from the bottom of a water tank will be a

Zig-zag path (which is geometrically undefined)
Parabola (vertex being at the opening)
Hyperbola
Horizontal straight line

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Fluid Mechanics
Turbine impeller

Produces only radial current
Is effective over wide range of viscosities
Does not produce tangential current
Produces only tangential current

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