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Design a helical torsion spring for severe service using stainless steel wire, ASTM A313. type 302, to exert a torque of 12.0 Ibin after a deflection of 270° from the free condition. The outside diameter of the coil should be no more than 1.250 in. Specify the diameter of a rod on which to mount the spring.
A motor grader will require 2 pases at 3 mph., 2 pases at 4 mph., and 2 passes at 5.5 mph. to accomplish the work How many grder hours will be required to accomplish this job if the job efficiency factor is 0.75.
how kinematic and diffusion wave model been used for rainfall runoff modelling. main computer programme involved.
Air photos are taken with specified overlap to take advantage of image parallax. Calculate the time interval between air photo exposures if the ground speed of the aircraft is 160km/h, the focal lenght is 50mm
A rectangular channel has water flowing at a depth of 1.6 ft with a corresponding specific energy of 1.736 ft. A step up on the channel bed resulte in the flow becoming critical. The critical depth is 1.29 ft and corresponding specific energy is 1..
Plot the adiabatic flame temperature and kmoles of CO2, CO, and NO at equilibrium for values of percent excess air between 10 and 100 percent.
A 3-mm thick panel (1 m x 1 m) of aluminum alloy (k = 177 W/m. K, Cp = 875 J/kg. K, and p(rho)= 2770 kg/m3) is heated in a large oven with air at T = 175oC and a convective heat transfer coefficient of h = 40 W/m2.K.
Plot the following sets of stress states on a set of principal axes (an example is provided in Figure 2A of the Appendix). Calculate the factor of safety for each stress state using both the Brittle Coulomb Mohr and Modified Mohr failure theories.
Gate AB in Fig is a homogeneous mass of 180 kg, 1.2 m wide into the paper, resting on smooth bottom B. All fluids are at 20°C. For what water depth h will the force at point B be zero?
A river is 6m deep. The riverbed material has a saturated unit weight of 19.5kN/m3. What is the effective vertical stress 12m below the water surface. Assume the water is static and assume a datum at the water surface.
A 1-m^3 volume tank contains a mixture of 18.32 moles of oxygen, 16.40 moles of Nitrogen, and 6.15 moles of carbondioxide. What is the partial pressure of each gass componet at 25 degrees
A rectangular channel carries a discharge of 2.00 m3/sec per meter of channel width over a weir crest that is 1.4 m in height. The energy grade line upstream of the weir measure 2.7 m above the channel bottom
Calculate the throat and exit areas for a mass flow rate of 0.25 kg/s, assuming the nozzle is isentropic. Why must this nozzle be converging- diverging?
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