Fluid Mechanics Sheet 10

Apart from inertia force, which of the following forces is most inportant in motion of submarines under water?

If the resistance R to the motion of a sphere through a fluid is a function of the density $\rho$, viscosity $\eta$ of the fluid, radius r and velocity v of the sphere, the number of $\pi$-parameters needed to express the function F (R, $\rho$, $\eta$, r, v)= 0 is -

Select the non-dimensional parameter of the following -

The pressure coefficient is the ratio of pressure forces to -

The value of Froude number can be -

The specific energy in m kg/kg for the flow expressed by V= 2.22 m/sec and y= 1 m is -

If the conjugate depths before and after the jump are 0.5m and 2.5m respectively, then the loss of energy in the hydraulic jump will be -

The height of hydraulic jump is equal to -

If the depth of flow in a channel is 1 m and velocity of flow is 2 m/sec, then the velocity with which an elementary wave can travel upstream is -

The speed of an elementary wave in still liquid at depth y is given by -