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Questions

Physics

A given object takes n times as much time to slide down a 45⁰ rough incline as it takes to slide down a perfectly smooth 45⁰ incline. The coefficient of kinetic friction between the object and the incline is given by

Chemistry

Two liquids A and B have vapour pressure in the ratio P_A⁰ : P_B⁰ = 4 : 5 at a certain temperature. Assuming that A and B form an ideal solution and ratio of mole fraction of A to B in the vapour phase is 1 : 5 then the mole fraction of B in the solution at the same temperature is

Mathematics

If a>0, , then the equation
has

(a) Exactly one real root (b) Two real roots (c) No real roots

(d) Infinite number of real roots

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