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A Brayton gas turbine cycle has two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300K and each stage of the turbine at 1200K. If the efficiency of each compressor is 80% and each turbine is 85% Determine: using variable specific heat method for: Case 1) no regenerator a) The back work ratio b) The thermal efficiency Case 2) a regenerator with 75% effectiveness a) The back work ratio b) The thermal efficiency
For a normal distribution, find the z score values that separate
a beam consists of three planks connected as shown by 3/8 in diameter bolts spaced every 12in.along the longitudinal axis of the beam.knowing that the beam is subjected to a 2500lb vertical shear, determine the average shearing stress in the bolts..
How much heat is required to raise the temperature of 10 pounds of water from 50 degrees fahrenheit to 70 degrees fahrenheit?
Gravitational forces pull the two stars together. What is the speed of each star at the moment of impact?
What was the percentage error found between experimental and accepted values and what caused any errors, and how could they be minimised?
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
a large plate contains a central crack of length 2 mm and is subjected to a cyclic stress normal to the crack which
Three springs anda mass are attached to a rigid, weightless bar PQ hinged at one end. How do I find the natural frequency?
Design value for the molded friction material and steel disks to be used 0.06 and pressure max=1400kpa. Determine appropriate values for the disk inside dimmeter, the total number of disks and the actuating force?
in a crank or slotted lever quick mechanism the distance between the fixed centre is 150 mm and driving crank is 75 mm. determine the ration of the time taken of cutting & return strake .
Two bars, one having a circular section of radius b, the other an elliptic section with semiaxes a,b. For equal angles of twist, which bar experiences the larger shearing stress?
suppose you are a materials engineer working for a beverage company and have been asked to identify what material
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