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An air-standard Otto cycle has a compression ratio of 7.5. At the beginning of compression, P1 = 85 kPa and T1 = 305 K. The mass of air is 2 g. and the maximum temperature in the cycle is 960 K. Determine:
(a) the heat rejection, in kJ.
(b) the net work, in kJ.
(c) the thermal efficiency.
(d) the mean effective pressure, in kPa.
air enters a one-inlet one-exit control volume at 6 bar 500 k and 30 ms through a flow area of 28 cm2. at the exit the
a simple pulley with the given radius r used to lift heavy objects is positioned 10 feet above ground level. Given that the pulley rotates theta degrees, determine the height to which the pulley is lifted.
A 90-N force is applied to the control rod AB as shown. Knowing that the length of the rod is 225 mm, determine the moment of the force about point B by resolving the force into horizontal and vertical components.
the steel pipe is filled with concrete and subjectednbspto a compressive force of 80 kn. determine the stress innbspthe
a closed rigid tank contains 5 lbm of a two phase mixture of water initially at 260degf with a quality of 0.6. heat
a diesel engine uses 54.4 kg of fuel oilh of calorific value 45 mjkg. the thermal efficiency of the engine is 25.
A) A huge reservoir of air supplies a converging-diverging nozzle with throat and exit areas of 10 cm^2 and 25 cm^2 respectively. The reservoir pressure and temperature are 150 kPa and 20C. Determine the range of back pressure over which
a carnot heat pump is to be used for heating house in winter. the house temperature is set at 25oc. one day the outdoor
a piston held by a pin in an insulated cylinder shown in figure above right contains 2 kg water at 100c quality 98. the
the 30 mg aircraft is climbing at the angle theta15 with a thrust t of 180 kn. at the instant shown its speed is 300
a heat exchanger is to be designed to condense 1100 kghr of steam ay 150 kpa. for this purpose cooling water at 50
Remember that velocity is a vector quantity so find the magnitude of the average velocity and the angle of average velocity from the horizon
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