Water is flowing through a 12-cm-diameter pipe that consists of a 3-m-long vertical and 2-m- long horizontal section with a 90° elbow at the exit to force the water to be discharged
downward, as shown in Fig. 2b, in the vertical direction. Water discharges to atmospheric air at
a velocity of 4 m/s, and the mass of the pipe section when filled with water is 15 kg per meter
length. Determine the moment acting at the intersection of the vertical and horizontal sections of
the pipe (point A). What would your answer be if the flow were discharged upward instead of
downward?

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.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false