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The block and tackle shown are used to lower a 150-lb load. Each of the 3-in.-diameter pulleys rotates on a 0.5-in.-diameter axle. Knowing that the coefficient of static friction is 0.20, determine the tension in each portion of the rope as the load is slowly lowered.
if the axial-flow pump is used to deliver 65000 galmin of 30oc water at 1200 rmin estimate a the impeller diameter b
the uniform slender bar abc weighs 6 lb and is intially at rest with end a bearing against the stop in the horizontal
suppose that 1 kg of saturated water vapor at 100ordmc is condensed to a saturated liquid at 100ordmc in a
A power plant receives 92,000 lbm/hr or coal that burns in 25 percent excess air. For simplicity, assume the coal is pure carbon. The combustion air/exhaust flow pressure drop through the steam generator is a total of 60 in-H2O. Find the power, in un..
consider a fin of rectangular cross section for heat rejection in an electronic system. the heat dissipation within the
The desire is to raise the temperature of the ambient air from 60 degree F to 350 degrees F. I need to calculate the amount of steam energy in BTU's per minutes and lbs of steam per minute necessary to accomplish the increase in air temperature?
results of a tensile test on sae 1035 cd steel yieled a mean value of the ultimate strength of 86.2 ksi and a standard
What is the probability that the strength is less than or equal to 5,000 psi. What is the probability that the strength is greater than 2,500 psi
A counter flow cooling tower cools 2000 gal/min water from 104 F to 85 F with 210,000 ft^3/min of air at 90 F Dry bulb Temperature and 76 F WBT. The Mass transfer coefficient -surface area product is hA= 123lbm/hr ft^3. Air mass flow rate per unit cr..
A 1:10 scale model study of an automobile is proposed. A prototype speed of 100km/h is desired. What wind-tunnel speed should be selected for the model study? Comment on the advisability of such a speed selection.
a frictionless piston-cylinder device fitted with stops above the piston contains 1.2 kg of air at 200degc and 700 kpa.
Calculate the 2x4 Block's Weight, mass, density and Specific Weight. Express values in both metric and US units. Compute the force needed to completely submerge the object.
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