NATS 1840 Lecture 12: Lecture Notes (Mar 7)
15 Mar 2017
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Impacts of fossil fuel combustion: upon combustion, production of carbon dioxide, production of nitrogen oxides, coal produces far more carbon dioxide than oil, gas, and geothermal. Coal is the most damning: two thirds of energy produced by coal doesn"t even become electrical energy. The ef ciency for natural gas is better: coal isn"t used much anymore in ontario. Carbon capture and storage (ccs: is we accept that fossil fuels will be part of future energy supply, then carbon dioxide production is inevitable, this process capture up to 90% of carbon dioxide in exhaust gases. Tuesday, march 7, 2017: fission of large atomic nuclei released thermal energy. Radioactivity and radiation: radiation energy is ejected by a decaying nucleus, high-energy light is ejected - gamma, electron/positron - beta, helium nucleus - alpha. Tuesday, march 7, 2017: level of radiation depends on time rate of nuclear decay and energy emitted per decay.
