Using the Rayleigh method, find an expression for the drag force (D) of a sphere of diameter ( ) falling slowly with a velocity (V) in a large vessel containing a liquid of density (p) and viscosity...

Using the Rayleigh method, find an expression for the drag force (D) of a sphere of diameter () falling slowly with a velocity (V) in a large vessel containing a liquid of density (p) and viscosity (µ,).

Using the Rayleigh method, prove chat the frequency of a wave caused by the motion of a yacht is proportional to ( V/1), where Vis the yacht velocity, l is its characteristics length, and the coefficient of proportionality is the Froude number.