An open water jet of circular cross-section and of 10 mm-diameter is deflected by a homogeneous rectangular block of thickness t, length of l and width of w (normal to the paper). the block weighs 10 n, the upstream velocity of the jet is given by u1 (r) = u (1- r2/r2) where r is the radial coordinate measured from the centerline of the jet. would the block tip under these conditions? if it does, calculate the magnitude of the horizontal force applied at corner a required for equilibrium. use: t = 20 mm, l = 120 mm, w = 200 mm, h = 80 mm,

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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.