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A 100-kW, 230-V, dc shunt generator, with Ra = 0.05 Ω, and Rf = 57.5 Ω has no-load rotational loss (friction, wind age, and core loss) of 1.8 kW. Compute:
(a) The generator efficiency at full load.
(b) The horsepower output from the prime mover to drive the generator at this load.
Determine the longest wavelength (in cm) of X-rays that is still capable of producing diffraction in copper, Cu.
(1) Determine the mass and the temperature of the steam in an insulated piston-cylinder arrangement if sufficient steam is admitted to displace the piston by one cubic foot. The cylinder originally is empty, and the piston main- tains a constant pres..
Calculate the mass of the liquid (the difference between the total mass of the graduated cylinder plus the liquid and the mass of the empty graduated cylinder).
Formulate arguments for and against the idea that risk assesment can and should be separated from risk management. Discuss land as a natural resource and how and why it is or should be regulated by environmental laws.
For the a-b-c phase sequence, take t = 0 at the instant when the flux linkages with the a-phase are maximum.
The unit cell for Cr2O3 has hexagonal symmetry with lattice parameters a = 0.4961 nm and c = 1.360 nm. If the density of this material is 5.22 g/cm3, calculate its atomic packing factor.
Two separate metal blocks of thickness d and 2d are kept at constant temperature T0 at the top anda constant heat flux q0 is provided at the bottom. Draw the steady state temperature profile for eachof the blocks.
the rate of flow to an ammonia synthesis reactor contains 25 mole ltbrgtnitrogen and the balance hydrogen. the flow
The ship must unload 1000 metric tons within 5 hours to avoid demurrage charges. Estimate the power required by the pump. Take the pump efficiency as 70%. Physical properties of toluene: density 874 kg/m3, viscosity 0.62 mNm-2 s.
Write reactions for which the enthalpy change will be a. Hf for solid aluminum oxide
What materials of construction should be specified
During the research that led to production of the two atomic bombs used against Japan in World War II, different mechanisms for obtaining a supercritical mass of fissionable material were investigated.
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