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Physics

An isolated particle of mass m is moving in a horizontal plane (x-y), along the x-axis, at a certain height above the ground. It suddenly explodes into two fragments of masses m/4 and 3m/4. An instant later, the smaller fragment is at y = +15 cm. The larger fragment at this instant is at

(a) y = -5 cm (b) y = +20 cm (c) y = + 5 cm (d) y = -20 cm

Chemistry

The rate constant for the reaction,

. If the rate is

, then the concentration of

(a) 1.4 (b) 1.2 (c) 0.04 (d) 0.8

Mathematics

If as its solutions, then

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