Multiple Choice Question: This phenomenon happens when water transitions from a supercritical flow to a subcritical flow.

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Orphaned Multiple Choice Questions (MCQ) due to changes of exam system.

It is a point formed by intersecting the three perpendicular bisectors of the sides of the triangle.
A boy is 25 years younger than his father. In 10 years, his father will be twice his age. Find the age of the boy.
What is the integral of (3 cos^5 x) dx with limits from 0 to pi/2.
Stations A and B are placed 1000 m apart on a straight road running East and West. From A, the bearing of the tower C is 32° West of North and from B the bearing of C is 26° North of East. Find the shortest distance of the tower from the road.
Find k so that x + 6 is a factor of x^4 + 4x^3 - 21x^2 + kx + 108.
It is an overflow structure built across an open channel for the purpose of measuring and controlling the flow.
Find the 4th term in the expansion of $(x^3 + y^2)^4$.
Evaluate 2000C2 + 2000C5 + 2000C8 + ... + 2000C29.
The arc of the parabola y = x2 from (1, 1) to (2, 4) is rotated about the y-axis. Find the area of the resulting surface.
An arch 18 m high has a form of a parabola with a vertical axis. The length of a horizontal beam placed across the arch 8 m from the top is 64 m. Find the width at the bottom.
Water that flows from the atmosphere to the earth’s surface in any variety of forms is known as:
The coefficient of curvature of a soil is defined as
The sum and product of three distinct positive integers are 15 and 45, respectively. What is the smallest integer?
The inner surface area in sq. m. of an open (both ends) cylinder 2 m in height and 3 m in diameter is:
Chords AB and AC are drawn on a circle of radius 10 inches. Find the angle between the chords if the arc BAC is 28 inches long.