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Multiple Choice Question with Only One Choice Correct
A body of mass m is thrown vertically upwards with a velocity v. The height h at which the kinetic energy of the body is half its initial value is given by

(a)		(b)
(c)		(d)

Chemistry

Fill in the Blank :
When distilled with zinc, phenol is converted into ......... .

Mathematics

Multiple Choice Question
Let f and g be differentiable function such that f'(x) = 2g(x) and g'(x) = -f(x), and let T(x) = (f(x))² - (g(x))². Then T' (x) is equal to