Which one of the following ores is best concentrated by froth floatation method?
At present, a firm is manufacturing 2000 items. It is estimated that the rate of change of production P w.r.t. additional number of workers x is given by
If A=⎣⎡12a2122−2b⎦⎤ is a matrix satisfying the equation AAT=9I, where I is 3×3 identity matrix, then the ordered pair (a,b) is equal to :(A) (2,−1) (B) (−2,1) (C) (2,1) (D) (−2,−1)
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0∘C. As it does so, it absorbs 208J of heat. The values of q and w for the process will be:
(R = 8.314 J/mol K) (l 7.5 = 2.01)
Two charges, each equal to q, are kept at x = ?a and x = a on the x-axis. A particle of mass m and charge q0=2q is placed at the origin. If charge q0 is given a small displacement (y a) along the y-axis, the net force acting on the particle is proportional to:
An ideal gas enclosed in a vertical cylindrical container supports a freely moving piston of mass M. The piston and cylinder have equal cross sectional area A. When the piston is in equilibrium, the volume of the gas is V0 and its pressure is P0. The piston is slightly displaced from the equilibrium position and released. Assuming that the system is completely isolated from its surrounding, the piston executes a simple harmonic motion with frequency: