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1. Modern aircraft gas turbine engines have pressure ratios of 30 or higher. Take that value with compressor inlet conditions of 1 bar and 300 K and a turbine inlet temperature of 1700 K and calculate the cycle efficiency. Then calculate the back work ratio. Assume the compressor and turbine are ideal. What is the entropy generation for the compressor and for the turbine?
2. Compressor technology has progressed further than turbine technology so compressor isentropic efficiencies approach 98% while those for turbines are nearer 92%.
When a 0.121 kg mass is suspended at rest from a certain spring, the spring stretches 4.10 cm. Find the instantaneous acceleration of the mass
Explain the spacing between allowed vibrational energy levels
To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of I=0.570 kg(m2), How much tension must the rope exert
a plane locked on cruise control flying due east at 300ms but its resultant velocity is 300.66ms at 3.8 south of east.
The total mass of the decay products is less than the mass of the original 294Uus atom and what accounts for this missing mass
A car is towing a boat on a trailer. The driver starts from restand accelerates to a velocity of +10.3 m/s in a time of 31 s. Thecombined mass of the boat and trailer is 409 kg. The frictionalforce acting on the trailer can be ignored. What is the te..
The cable of a hoist has a cross-section of 80 mm2. The hoist is used to lift a crate weighing 500 kg. How much will it extend if it is made of steel
Consider two widely separated conducting spheres, 1 and 2, the second having six times the diameter of the first. Find the final charge q1 and q2
A uniform soda can of mass 0.138-kg is 11.80-cm tall and filled with 1.30-kg of soda. Then small holes are drilled in the top and bottom (with negligible loss of metal) to drain soda. (Initially the soda can is full.)
The tires of a car make 55 revolutions as the car reduces its speed uniformly from 86km/h to 50km/h . The tires have a diameter of 0.90m. how much more time is required for it to stop
Electric eels generate electric pulses along their skin that can be used to stun an enemy when they come into contact with it, How much energy is delivered to the unfortunate enemy with a single pulse, assuming a steady current
A new record for running the stairs of the Empire State Building was set on February 3, 2003. what was his average power output during the climb
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