Q.25 A fixed control volume of a stream tube in steady flow has a uniform inlet flow (p.. A,, V,) and a uniform exit flow (p, A, V,) as shown in figure. The expression for the net force on the control volume. Fixed control volume civil engineering m= constant

A cylindrical drum of length l and radius r can rotate inside a fixed concentric cylindrical casing, the clearance space c between the drum and the casing being very small and filled with liquid of dynamic viscosity µ. To rotate the drum with angular velocity o requires the same power as to pump the liquid axially through the clearance space while the drum is stationary, and the pressure difference between the ends of the drum is p. The motion in both cases is laminar. Neglecting end effects, show that 2µlro/3 p = c2

The particle of mass m = 2.3 kg is attached to the end of the light rigid bar of length L = 0.83 m. The system is released from rest while in the horizontal position shown, at which the torsional spring is undeflected. The bar is then observed to rotate 45° before stopping momentarily, (a) Determine the value of the torsional spring constant kr. (b) For this value of kr, determine the speed vof the particle when e = 25°. kT Part 1 Position 1 is the horizontal orientation shown in the figure. Position 2 is the orientation when e- 45. Find the kinetic energy in positions 1 and 2. Answers: T1- kg m²/s2 T2- kg m²/s? Answers: (a) ky = i Nem/rad (b) m/s

From the figure below, determine the reaction force at point O. DE 0.5 m 0.5 m 0.4 m F = 300 N B A 0.3 m 0.2 m 0.1 m y