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Design a four-dwell cam to move a follower of mass == 1.25 bl from 0 to 2.5 inches in 40°, dwell for 100°, fall 1.5 inches in 90°, dwell for 20°, fall 0.5 inches in 30°, dwell for 40°, fall 0.5 inches in 30°, and dwell for the remainder. The total cycle must take 15 sec. Choose suitable programs for rise and fall to minimize dynamic forces and torques. Size a return spring and specify its preload to maintain contact between cam and follower. Calculate and plot the dynamic force and torque. Assume damping of 0.18 times critical. Repeat for a form-closed cam. Compare the dynamic force, torque, and natural frequency for the form-closed design and the force-closed design.
asers can be used to drill or cut material. one such laser generates a series of high-intensity pulses rather than a
dry ice 560 g is introduced into an evacuated 20l container. the temperature rises and co2 vaporizes. if the pressure
How to convert kilo pascal to psi ?measure units How to convert 52 kilo pascal to psi ?measure units
Another explanation for the leaning of the Pisa tower is that in earlier ages (before the start of the building of the tower, in 1400) a heavy structure stood near that location. On which side of the tower would that building have been? P
a a refrigeration system has a coeiumlnotfnofcient of performance of 5. the heat rejection is an isothermal process at
If the design specs require that each column support a load of 100 kN with a safety factor of 3, find the necessary column thickness t.
Prepare dimensionless performance curves for the 205-mm-diameter radial flow pump of Fig. 12.6. Compare these with the curves shown in Fig. 12.12. Can you explain why there may be differences between the two sets of curves?
calculate the exergies of two closed systems respectively 1 kg of steam at 800 kpa and 180 degc and 1 kg of r-134a at
steam enters an extraction turbine in a vapor power plant operating at steady stte at 10 mpa 480 c. 25 of the steam is
1. a face-milling operation is performed to finish the top surface of a steel rectangular 5 workpiece 12.0 in long by
Calculate the theoretical potential of each of the following cells.
Specify the suction hose size, the design of the rigid piping connecting the hose to the pump inlet, the discharge piping to the water cannon, valves, and other fittings.
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