Hydraulics and Fluid Mechanics in ME
The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly enlarged to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden enlargement is

(v₁² - v₂²)/g
(v₁² - v₂²)/2g
(v₁ - v₂)²/2g
(v₁ - v₂)²/g

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Hydraulics and Fluid Mechanics in ME
The conditions for the stable equilibrium of a floating body are

the center of buoyancy and the center of gravity must lie on the same vertical line
the meta-center should lie above the center of gravity
all the above are correct
a righting couple should be formed

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