The statement that is not true about the difference between laminar and turbulent boundary layers is: a. the reynolds number for a turbulent boundary layer is higher than that for a laminar boundary layer. b. the wall shear stress for a turbulent boundary layer is greater than that for a laminar boundary layer. c. a turbulent boundary layer is thicker than a laminar boundary layer. d. the velocity gradient at the wall is greater for a laminar boundary layer than a turbulent boundary laye

On a average work day more than work place firs are reorted

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.