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Physics
A uniform disc of mass m and radius R is rolling up a rough inclined plane which makes an angle of 30⁰ with horizontal. If the coefficients of static and kinetic friction are each equal to and the only forces acting are gravitational and frictional, then the magnitude of the frictional force acting on the disc is ………. and its direction is ………. (write up or down) the inclined plane.
Chemistry
Ammonia, on reaction with hypochlorite anion, can form (a) NO (b) NH₄Cl (c) N₂H₄ (d) HNO₂
Mathematics
The value of lying between =0 and and satisfying the equation are

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