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The wheel of a crane lift is rolling on a flat rail. The radius of the wheel is 4 in, the contact length and force are 2.5 in and 1 ton respectively, and E = 30 MPa and v = 0.3 for both parts. Determine (a) the maximum contact pressure, (b) the width of the contact area.
a centrifugal pump has d1 6 inches d2 14 inches b1 5 inches b2 4 inches beta1 20 degrees beta2 45 degress and rotates
a painter is standing on a work platform that is 27 feet above ground level. for fall protection the workers safety
steam enters a long pipe as a saturated vapor at a pressure of 2 mpa. due to heat loss from the pipe to the
liquid water enters a manifold series of pipes at 1080 psi and 125 degf with a mass flow rate of 3.5 x 10 6 lb hr and
showing the two upward pulls of the rings on his hands, each of size 380N. Calculate the angle between the wires supporting the rings and the vertical.
sixteen kg of air and two kg of helium gas are sealed in a rigid and insulated internal-piston-cylinder device.
a 2.75 m3 rigid tank initially contains air at 104 kpa and 22 degrees c. the tank is connected to a supply line through
a 100-mm long and 20-mm diameter rod of 403-stainless steel is pulled to fracture with reported results as follows
Calculating the heat transfer rate and the rate that entropy is produced in a gear box. A gearbox operating under steady state conditions recieves 24 hp along the input shaft and delivers 10hp along the output shaft
a laser beam is incident on two slits with a separation of 0.230 mm and a screen is placed 4.95 m from the slits. an
an arrow is shot straight up in the air with an initial speed of 210 fts. if on striking the ground it embeds itself
air undergoes a polytropic expansion process in a piston-cylinder assembly from 75 psia and 300 f to 15 psia. employing
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