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Physics

A thin metal ring of mass 0.5 kg has a diameter of 0.5 m. It is rotating in a horizontal plane about an axis passing vertically through its centre. If the ring completes 10 revolutions in 5 s, determine (i) its angular velocity, and (ii) its rotational kinetic energy.

Chemistry

Fill in the Blanks :
Libermann reaction is shown only by ........ amines.

Mathematics

Multiple Answer Question
Equation of a line passing through (1, -1) and perpendicular to a line given by x² - 5xy + 4y² = 0 is

(a)	4x + y = 3	(b)	x - 4y = 5
(c)	x + y = 0	(d)	x - y = 2

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