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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.
a pressurized tank is nominally at 205 degree c. the density determination must be within 0.5 to be useful. if the
Find the diameter of a pipe to convey the superheated steam flowing into the mixing process if the speed of the steam is 20m/s and also ascertain the condition of the resulting mixture.
the crate s is being lifted by a man moving to the right with constant speed of 0.50ms. determine the velocity and
many important engineering structures are often coated in a protective paint layer of some kind. this is not simply to
Assume that a resolved shear stress of 1.4 MPa is applied to a crystal and causes dislocations to pile up at a precipitate particle. Assume that the shear strength of the particle is 7.2 MPa. What is the largest number of dislocations that can pil..
Explain the fundamental difference in scaling principles between a “time constant related system” and a “diffusion related system”. Briefly describe an example of how the similarity approach for the analysis of scaling can break down when applied to ..
a gas flows steadily into a cylindrical core of porous media and out the other side. if the output flow rate is twice
Other observations by the Cassini probe have confirmed that Titan has a thick atmosphere of nitrogen and methane with a density of about 10 times that of the Earth's atmosphere. Is this finding completely consistent with Titan's position on the atmos..
the torsional assembly shown in figure consists of a solid bronze gb 45 gpashaftcd and hollow aluminium alloyga28 gpa
The 95% confidence interval associated with the corrected counting rate.
two tanks tank a and tank b are seperated by a partion. initially tank a contains 2 kg steam at 1mpa and 300 celsius
The rectangular test section of material is slowly loaded with a 450 kN axial load. The original cross-section is 25 mm by 100 mm. The original length is 2 meters. Once fully loaded, the 100 mm side measures 99.96 mm and the length has increased by 2..
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