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16A small stepladder has vertical rails and horizontal steps formed from a C-section aluminum channel (Figure P5.28). Two rivets, one in front and one in back, secure the ends of each step. The rivets attach the steps to the left- and right-hand rails. A 200-lb person stands in the center of a step. If the rivets are formed of 6061-T6 aluminum, what should be the diameter dof the rivets? Use a factor of safety of 6, and round your answer to the nearest 1of an in.
a block of mass 0.256 kg is placed on top of a light vertical spring of force constant 4 925 nm and pushed downward so
air at 100 kpa and 20oc is compressed to 700 kpa steadily and adiabatically at a rate of 2 kfs. determine the power
Determine the refrigeration load QL and The COP of the refrigerator - If the isentropic efficiency of compressor is 0.8 calculate the actual work of the compressor.
Calculate the velocity v of the collar as it hits the stop at B if it is elevated from rest at A by the action of the constant 40-N force in the cord. The cord is guided by the small fixed pulleys.
Calculate the torque M on the shaft of the gate at B required to prevent the gate from opening when the salt-water level drops to h = 3 ft.
A fixed mass of air is at a temperature of 100 degrees Celsius and a pressure of 500 kPa. Determine the specific volume.
Calculate the film thickness at the trailing edge and overall heat transfer coefficient
a 2-2-2 kinematic coupling uses 19-mm silicon nitride balls and tungsten carbide vees. determine the hertz contact
Carbon content of steel, A steel contains 55% alpha-ferrite and 45% gamma-ferrite or austenite at 750 degrees celcius. What is the carbon content of steel?
A centrifugal compressor has an impeller tip speed of 366 m/s. Determine the absolute Mach number of the flow leaving the radial vanes of the impeller when the radial component of the velocity at impeller exit is 30.5 m/s and the slip factor is .9. G..
an aluminum alloy specimen brought to tensile test had frac12 inch2 cross sectional area. it was tested to fracture and
a rigid well insulated container with a volume of 2 ft3 holds 0.12 lb of ammonia initially at a pressure of 20 lbfin2.
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