Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

decrease
remain same
increase
increase/decrease depending on depth of immersion

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

zero at the mid plane and varies linearly with distance from mid plane
constant over the cross section
zero at plates and increases linearly to midpoint
parabolic distribution across the section

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