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Air modeled as an ideal gas enters a combustion chamber at 20 lbf/in^2 and 70F through a rectangular duct, 5 ft by 4 ft. If the mass flow rate of the air is 830,000 lb/h, determine the velocity, in ft/s.
an electric motor operating at steady state draws a current of 10amps with a voltage of 220v. the output shaft power
a power cycle operates between hot and cold reserviors at 600 k and 300 k rspectively. at steady state the cycle
a 100 pound ball is suspended from a wall by a rope that is pulled asided by a horizontal rope B and held so that rope A makes a angle of 30 degrees with the vertical wall. Find the tension in ropes A and B?
4-81 air is contained in a cylinder device fitted with a piston-cylinder. the piston initially rest on a set of stops
since dw tdl where w is work the basic equation for the internal energy of rubber is du tds tdl where t is the
a cylinder of radius a is balanced on top of a fixed cylinder of radius b b gt a . if the balance is slightly
a tank contains 1 kg of carbon dioxide at 6 mpa 60 degrees celsius and it is connected to a turbine with an exhaust at
a rod has a cross sectional area of 1 cm2. its material has the following strength properties beyond which it breaks
The main bearing of a steam engine is 100 mm in diameter and 175 mm long.the bearing support a load of 28 kn at 250 r.p.m.if the ratio of the diametral clearance to the diameter is 0.001 and the absolute viscosity of the lubricating oil is 0.015 kg/m..
a closed system undergoes a cycle consisting of two processes. during the first process 40 btu of heat is transferred
an orthogonal cutting operation is being carried out under the following conditions depth of cut 0.15mm width of cut5mm
an ideal vapor compression refrigeration cycle with r-134a as the working fluid operates between the pressure limits of
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