Two reservoirs at different levels are connected by two parallel pipes of lengths L and diameters 2d and d respectively. Assuming the friction factor is the same for both pipes, the ratio of the discharge in the two pipes (larger : smaller) is:

For a two-dimensional flow, the stream function is given by ψ = 3x2 - y3. The magnitude of velocity at the point (2, 1) is:

In a Stokes' experiment of a falling sphere, it is found that a sphere of 5 mm diameter falls in a liquid with a terminal velocity of 20 mm/s giving a drag coefficient of 240. If the ratio of specific gravities of the sphere and liquid is 2.85, what is the kinematic viscosity of the liquid in stokes?