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A six cylinder engine runs at 4000 RPM with a compression ratio of 8:1 and a total clearance volume (total for all 6 cylinders) of 600 mL at TDC. The engine intakes atmospheric air at 100 kPA & 20C. The maximum temperature during the cycle is 1500 C. determine the following assuming the engine operates on an air standard Otto cycle with constant specific heats:
The heat supplied per cycle
The thermal efficiency
The POWER output in HP
Note: PV=mRT applies and the net work produced is per cycle.
given a thin-walled square tube with median edge dimensions a x a wall thickness t and a longitudinal slot of
determine the magnitude of the initial velocity of the bullet and the magnitude of the force exerted by the bullet on the block.
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Refrigerant-134a is throttled from saturated liquid state at 7 bar to a pressure of 1.4 bar. Determine the temperature drop during this process and the final specific volume.
A 50 hp motor with an efficiency of 0.80 is to be replaced by a newer model motor with an efficiency of 0.90. The motor is expected to operate 3000 hours per year. The cost of electricity in our area is $0.06 per kWhr.
a steel thermal diffusivity 0.00001172 k43 cylinder 10 cm in diameter and 10 cm long is initially at 300degc. it is
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a 200mm long 10mm dia. tensile sample experienced plastic deformation at a strain of 0.01. the applied load was 78.5
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