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A tension spring used in a machine must exert an essentially static force of 135 N. It is to be wound with an initial tension of 45 N, and have a spring rate of 11.0 kN/m. Determine a satisfactory combination of D, d, N, and wire material. What is the length of the coiled section when unloaded and when the 135 N force is applied?
Two bars AC and BC are connected by pins to form a structure for supporting a vertical load P at C (Figure P3.5). Determine the angle a if the structure is to be of minimum weight.
assuming that the disk rolls without slip and the force p 18 n in the positive x-directionradius of disk r 20 cmmass
a stream of methane initially at 60 degf and 400 psia is compressed in a single stage compressor to 1000 psia by a
Assume a biomass heating value of 17 MJ/kg, a biomass-to-syngas thermal efficiency of 85%, and a syngas-to-electricity efficiency of 38%.
for the development of software products the scm software configuration management process is closely followed as a way
a gate with a circular cross section is held close by a lever 1 m long attached to a buoyant cylinder. the cylinder is
a steady frictionless air at 100 kpa and 25 c flows in a horizontal duct that has a cross sectional flow area reduction
an electrical wire having a diameter of 1.5 mm and covered with a plastic insulation thickness 2.5 mm is exposed to
Disregarding heat conduction through the shaft and assuming one-dimensional heat transfer, determine (a) the rate of heat transfer to the coolant, (b) the surface temperature of the shaft, and (c) the mechanical power wasted by the viscous dissipa..
the reynolds number re is a dimensionless number used in fluid mechanics and is defined as repvdu where p is the fluid
Starting from rest at s = 0, a boat travels in a straight line with the acceleration shown by the a-s graph. Determine the boat's speed when s = 50 ft, 100 ft, and 150 ft.
Determine the factor of safety in operation and the angle of twist per metre length.
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