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A three-phase induction motor, operating at its rated voltage and frequency, develops a starting torque of 1.6 times the full-load torque and a maximum torque of 2 times the full-load torque. Neglecting stator resistance and rotational losses, and assuming constant rotor resistance, determine the slip at maximum torque and the slip at full load.
At Chernobyl in 1986, hydrogen was produced by the reaction of superheated steam with the graphite reactor core: C(s)+H2O(g) yields CO(g)+H2(g) It was not possible to prevent a chemical explosion at Chernobyl
A mixture of benzene and toluene containing 60 mole percent benzene is to be separated into an overhead product containing 96 mole percent benzene and a bottoms containing 25 mole percent benzene.
Describe how fuzzy logic might be used in the control of a system for measuring blood glucose levels. What advantages would the fuzzy logic system have over a more conventional system?
What is fugacity? How does it relate the chemical properties of ideal gases to real gasses and what is the equation for it?
Safety considerations require that the maximum steady-state temperature of the system remain below 475°C. Will a spherical container with inner and outer diameters of 1.0 m and 1.2 m, respectively, satisfy this requirement?
Calculate the power transferred across the air gap, the rotor copper loss at full load, and the electromagnetic torque at full load in newton-meters.
Determine the primary to secondary ratio of the line-to-line voltages and the line currents.
What is the best way to report density and absolute error in density based on the mass and volume measurements? Choose the single best answer 10.07 ± .194 gm/ml 10. ± .2 gm/ml
100 gallons per minute flow of water at 50 degrees F passes through a theoretically 100% efficient heat exchanger. The hot side or energy to the heat exchanger is a 510 degree F hot gas (essentially steam).
Determine the kVA rating of the synchronous motor.
A reverse osmosis plant is to be designed to produce 50 kg/s of boiler feed water with less than 20 ppmw of NaCl starting from sea water that contains 3.5 wt% NaCl. The 40 m2 membrane modules operate at 60 atm and achieve a flux of 0.4 m3 /m2 .day..
If an externally applied electric field produces a 5% expansion of the lattice, compute the dipole moment for each Na+-Cl- pair. Assume that this material is completely unpolarized in the absence of an electric field.
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