A three-phase, 410-kVA, 2300-V alternator has an armature resistance of 0.4 ohm per phase and a synchronous reactance of 1.3 ohm per phase. Determine the no-load line-to-line generated voltage and the voltage regulation at 1) Full-load kVA, 0.82 power factor lagging, and rated voltage. 2) Full-load kVA, 0.73 power factor leading, and rated voltage. 3) Explain why the generator voltage regulation is different for different load power factors.

Fluids at rest possess no flow energy. a)- true b)- false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux