Science 30 January 2000 Diploma Examination

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33. The alpha decay of radium-226 is represented by A. 226 Ra → 222 Rn + He 2 4 88 86 B. 226 Ra → 222 Rn + 4 4 He 88 84 C. 226 Rd → 222 Po + 4 4 He 88 84 D. 226 Rd → 222 Po + 2 4 He 88 84 Numerical Response 11. The energy produced when 0.220 kg of nuclear fuel is transformed completely into energy is __________ × 10 16 J. (Record your answer to three digits in the numerical-response section on the answer sheet.) 34. An environmental concern that may be associated with coal but not with nuclear power generation is A. acidic deposition B. thermal pollution C. pollution from phosphates D. depletion of the ozone layer 20
Use the following information to answer the next question. Conventional Power Plant 35% Electrical power Fuel in 100% Conventional power plant Waste heat 65% Numerical Response 12. The efficiency of the conventional power plant is _______%. (Record your answer to two digits in the numerical-response section on the answer sheet.) 21
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Science 30 January 2000 Diploma Examination

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