show work! On the list below, the number closest to the Betz Limit value is: (a)
ID: 2078177 • Letter: S
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On the list below, the number closest to the Betz Limit value is: (a) 24% (b) 35% (C) 60% (D) 79% (e) 91% (f) 90% For capturing solar energy, Concentrated Solar Power (CSP) plants may use (mark the incorrect answer): (a) An array of parabolic troughs; (b) An array of photovoltaic (PV) panels; (c) A large circular parabolic mirror; (d) A Fresnel mirror consisting of long flat mirror stripes; (e) An array of flat movable mirrors. The substance used as a moderator in a nuclear reactor should contain atoms whose nuclei are: (a) Light, because neutrons loose more energy in collisions with light nuclei than in collisions with heavy nuclei; (c) either light or heavy, it does not really matter; (d) Strong neutron absorbers; (e) None of the above. The largest US pumped-storage hydropower plant is: (a) On Colorado River (Hoover Dam). (b) In the State of Washington (c) In the State of Nevada; (d) In the state of Virginia; (e) On Niagara River.Explanation / Answer
1). According to Betz law, no turbine can capture more than 59.3% of Kinetic energy in Wind.
This is close to 60%.
2). PV cells are not used.(b) is correct.
3). Mathematics of elastic collision tells us that..as neutrons are light, moderator should also be light for transfer of kinetix energy.
4). Bath county in state of Virginia.
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