How does a generator act as a motor running at no load?
What will be an ideal response?
If a generator loses DC excitation to the rotor it does not generate, the prime mover power still turns the rotor. Now the generator acts as a motor running at no load.
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The default carbon dioxide emission factor for diesel fuel is 74,100 kg/TJ. Which common transportation fuel (gasoline or diesel) has the greater carbon intensity per unit of energy? What are their respective carbon intensities compared to natural gas?
What will be an ideal response?
How many phase rule variables must be specified to fix the thermodynamic state of each of the following systems?
(a) A sealed flask containing a liquid ethanol-water mixture in equilibrium with its vapor. (b) A sealed flask containing a liquid ethanol-water mixture in equilibrium with its vapor and nitrogen. (c) A sealed flask containing ethanol, toluene, and water as two liquid phases plus vapor.
Why was agriculture necessary to the development of civilizations?
What will be an ideal response?
What is a specified dimension?
What will be an ideal response?