Air at a static temperature of 20oC and a static pressure of 101 kPa flows through the inlet of aconvergent-divergent nozzle at the rate of 0.5 kg/s. The exit area of the nozzle is 1.355 times theinlet area. If the air leaves the nozzle at a static temperature of 20oC and a stagnation temperatureof 30oC, calculate the inlet and exit Mach numbers, the increase in entropy (if any) between theinlet and the outlet, the area at which the shock (if any) occurs and the stagnation pressure at theexit.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

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.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.