1.

A uniform disc rotates freely about a fixed perpendicular axis making n_(1) revolutions per minute. Wax of mass m falss vertically and sticks to the disc at distance x from the axis Rotational speed reduced to n_(2) rpm, then moment of inertia of the disc is (n_(2))/(n_(1)-n_(2))"mx"^(n) where 'n' is

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