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A spark-ignition engine has a compression ratio of 8, an isentropic compression efficiency of 85%, and an isentropic expansion efficiency of 95%. At the beginning of the compression the air in the cylinder is at 13 psia and 60 °F. The maximum gas temperature is found to be 2300 °F by measurement. Determine the heat supplied per unit mass, the thermal efficiency, and the MEP using cold air standard analysis
the steel bolt and anchor assembly is used to reinforce the roof of a passageway in an underground coal mine. in
at a amusement park there are 180kg bumper cars a b and c that have riders as shown with masses 40 kg 60kg and 30 kg
what is the density of solid aluminum at the melting temperature? what is the density of liquid aluminum at the melting
an air-standard dual cycle has a compression ratio of 9. at the beginning of compression p1100kpa t1300k and v114l. the
The roof is supported by cables. If the cables exert FAB = 100N and FAC = 120N on the wall hook at A, determine the magnitude of the resultant force acting at A.
find (a) the power rating of the electric heater and (b) the temperature rise that the air experiences each time it passes through the heater.
steam at a pressure of 0.08 bar and a quality of 93.2 enters a shell-and-tube heat exchanger where it condenses on the
the block b is suspended from a cable that is attached to the block at e wraps around three pulleys and is tied to the
in europe automotive air conditioners using co2 as a working fluid may replace current equipment based on r134a within
the suspended load exerts a force F=600 lb at A, and the weight of the bar OA is negligible. Determine the tensions at the cables and the reactions at the ball and socket support O
Compute the x-and y-components of the force acting on the pinB connecting the two members of the machine subjected to the 200-N load.
one mole of ideal monoatomic gas undergoes an irreversible adiabatic process in which gas ends up at stp and for which
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