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A work platform is elevated on the end of a boom that has the ability to extend its length and vary its angle with respect to the ground. The platform width is large compared to the boom diameter so that it is possible to load the boom eccentrically resulting in a combination of bending, torsion and direct compression in the base of the boom. At the base the boom is a hollow tube with an outside diameter of 8 inches and a wall thickness of 0.75 inch. It is made from SAE 1030 CR steel. Determine the factor of safety against static failure if the loading at a point at the base of the boom is M=600,000 in-lb. and T=76,000 in-lb., and there is an axial compression of 4800 lb.
refrigerant 134a is compressed at steady state from 2.4 bar 0oc to 12 bar 50oc. refrigerant enters the compressor with
Determine metal removal rate, etching time, and required dimensions of the opening in the cut and peel maskant required to achieve the desired pocket size on the part.
the 230000 lb space shuttle orbiter touches down at about 220 mihr. at 200 mihr its drag parachute deploys. at 35 mihr
refrigerant 134a at 700 kpa and 40oc is expanded adiabatically in a closed system to 60 kpa. determine the work
at standard atmospheric temperature and pressure 25 c and 1 atm how many moles of dry air be present in a room having a
consider refrigerant r-134a flowing in a smooth horizontal 10-mm-inner-diameter tube of wall thickness 2 mm. the
a spring-mass system has a frequency of 2 hz. when the mass is decreased by 0.4 kg the frequency is changed by 25.
an insulated piston-cylinder device initially contains 9.647 lb of air at 20 psia and 60ordmf. then 1000 btu per lb of
a baseball player catching a ball can soften the impact by pulling his hand back. assuming that a 5-oz ball reaches his
It is known that a long log floats with its axis horizontal. A very short log, however, floats with its axis vertical. Determine the maximum length of a cylindrical walnut log 30 cm in diameter that will cause it to float with its axis vertical.
a uniform beamoflength l flexural rigidity ei and cross-sectional plastic moment mp is built-in at both ends and
in the absence of compressed liquid property tables it is common to approximate properties by using the saturated
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