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Determine the mean effective pressure of an ideal Otto cycle that uses air as the working fluid; it's state at the beginning of compression is 13 psia and 56°F; it's temperature at the end of combustion is 1,525°F; and it's compression ratio is 11. Use constant specific heats at room temperature for this problem.
a piston-cylinder assembly of initial volume of 0.6 m3 contains h2o at 500 kpa and 280oc. the system is cooled in a
Determine the forces in members DE,DF, and EF of the scissors truss shown. Also, state whether the members are in tension or compression. Note that the 400 lb force is directed along the line BF and the 800 lb force is parallel to line BF.
the piston has a mass of 4kg and cross-sectional area of 35cm^2. A compressed spring above the piston exerts a force of 60N on the piston. if the atmospheric pressure is 95kPa, determine the pressure inside the cylinder.
cold water cp 4.18 kjkgc leading to a shower enters a well-insulated thin walled double-pipe counter-flow heat
an 84.5 kg hiker is trapped on a mountain ledge following a storm. a helicopter rescues the hiker by hovering above him
a balanced wheel supported on springs is rotating at 1200 rpm. if a bolt weighing 15 g and located 5 cm from center
a flow of 4 kgs ammonia goes through a device in a polytropic process with an inlet state of 150 kpa -20degc and an
imagine that you work for an optical company and must measure and then report on the values of magnification produced
a spherical gas container made of steel has a 5-m outer diameter and a wall thickness of 6 mm. knowing that the
steam enters an adiabatic turbine at 400c and 2mpa pressure. the turbine has an isentropic efficiency of 0.9. the exit
conventional ceramics have a fracture toughness of about 5 while advanced ceramics may have 20. determine1 how larger
a conical hole is machined in a metal whose emissivity is 0.5. the hole is 2.5 cm in diameter at the surface and 7.5 cm
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