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Determine the air velocity at the exit when the inlet velocity is very low (can be neglected) and the nozzle isentropic efficiency is 90%.
Water Steam at 3MPa and 400oC is expanded to 100kPa in an adiabatic turbine with an isentropic efficiency of 92%. Determine the power produced by this turbine in kW when the mass flow rate is 2kg/s
The temperature of argon at the outlet is 20oC. Determine the outlet pressure of air and the specific work produced by this turbine
Consider X = Norm(5,7), Y = Norm(5,7) and Z = Norm(1,9) and assume X,Y and Z are independent. Find and sketch the probability density function of the random variable T = X-Y+Z.
If the maximum torsional shear stress is limited to 10KSI, determine the minimum outer radius to the nearest 1/8 in. Show all steps and calculations.
As the load on the motor is increased, the developed torque increases to 50 Ib-ft. Find the armature current required to produce the increased torque.
A 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat, ready to dive, each with a 16-ft/s velocity relative to the boat.
How larger surface edge crack can the advanced ceramics tolerate than the conventional ceramics for the same applies load?
In a spring mass system a 1kg block is dropped from a height of 1 meter on top of a spring with a spring constant (k) vlaue of 100N/m.
One structure is made from a Si3N4 plate which has a plane strain fracture toughness of 3.6 and is alternatively loaded with a tension stress of 300 MPa and a compression stress of 60 Mpa.
Calculate the required heat transfer to or from the reactor (state which it is) in kJ. Calculate the heat of this reaction at 400 degrees C and 1 atm.
The thermal conductivities of cast iron and enamel are 50 and 1.05w/mk respectively. Calculate the resistance to the heat transfer for unit area, and the rate of heat transfer per unit area.
What is the heat rejection for the condenser in btu/h? If the condenser is water cooled with cooling water entering at 85deg F and leaving at 100 deg F, what flow rate of cooling water is required i
Steam having a mass of 3kg and initially at 2.5MPa and 350°C has 2460kJ of heat removed at constant temperature until the quality is 90%. Determine the pressure when dry saturated steam exists;
If the cooling water enters at a temperature of 20 degree C and exits at a temperature of 25 degree C and has a mass flow rate of 1 kg/s, determine the minimum power input of the compressor.
If the power output of the turbine is 2 MW, determine a) the isentropic efficiency of the turbine and b) the mass flow rate of the steam flowing through the turbine.
For the same power as in part (a), what is the maximum outside summer temperature for which the house can be maintained at 25 degrees celsius?
Because of inspection limitation, the smallest crack that can be detected is 2.54 mm. which material would you recommend if the plate is to be of minimum weight?
A cascade system using two ideal refrigeration cycles is used. Determine the coefficient of performance for the overall system.
What angle acompensates for the wind such that the shell peaks directly over the launch point A? What is the maximum height h achievable when launched at this angle?
What is the Heat Rate of this plant in the winter (in BTU/kW-hr)? What is the average mass flow rate of steam passing through the turbine (in pounds/hr)?
The engine exit as well as the inefficiencies of engine components, determine the force that must be applied on the brakes to hold the plane stationary.
Determine the time required from the beginning of the first hole to the completion of the last hole, assuming the most efficient drilling sequence will be used to accomplish the job.
The lathe is equipped with a 15-hp electric motor and has a mechanical efficiency of 80%. The spindle is 500 rpm. Estimate the maximum feed that can be used before the lathe begins to stall.
On one side the gate holds back a 0.5 m deep body of water. On the other side, a 10 cm diameter water jet hits the gate at a height of 0.5 m.