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1. A quenched and tempered 10110 steel is found to have surface cracks that cause the heattreated part to be rejected by the customer. Why did the cracks form? Design a heat treatment, including appropriate temperatures and times that will minimize these problems.
2. Design a corrosion-resistant steel to use for a pump that transports liquid helium (He) at 4 K in a superconducting magnet.
Air flows through a pipe with a variable diameter at a constant volumetric flow rate of 0.5 m^3/s. Assuming the velocity profiles are uniform throughout use mass conservation to find the velocity where the diameter is 0.4m and 0.2m
the third and fourth stages of a rocket are coasting in space with a velocity of 15000 kmh when the fourth-stage engine
steam flows steadily through a turbine at a rate of 47000 lbmh entering at 1000 psia and 900 degrees f and leaving at 5
In the equation for Rent's rule with C = 4.5 and m = 0.5, determine the value of nio and nc at which the number of logic gates equals the number of I/O terminals in the package.
a well-insulated piston-cylinder assembly is connected by a valve to an air supply line at 8 bar. initially the air
Assume that a change in refractive index of n=0.125 is required to switch the display from reflective to dark when the light comes in normal to the film plane. What electric field E (in V/m) must be applied to switch the display from reflective t..
a river has a steady speed of 0.461 ms. a student swims upstream a distance of 1.00 km and swims back to the starting
the 0.78 kg bob of a pendulum is fired from rest at position a by a spring which has a stiffness of k 1.62 knm. the
As shown in the figure, air is contained in a vertical piston-cyclinder assembly fitted with an electrical resistor. The atmosphere exerts a pressure of 14.7 lbf/in2 on the top of the piston, which has a mass of 100 lbm and a face area of 1 ft2. A..
you are asked to design a solid circular shaft of minimum cost that is 1.3 m long and has to twist less than 3 degrees
a satellite is in a circular orbit 250 mi above the surface of the earth. determine the new perigee and apogee
Explain the difference between the damping coefficient and damping ratio. Which should be used in engineering practice? Explain
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