IB Physics: Solutions

1. Approximately 8000 TWh of electricity is produced from Coal per year. (data source IEA/OECD) a. If coal accounts for 41% of electricity produced what is the total electrical energy produced per year? b. If the Energy density of coal is 24MJ/kg and the efficiency of a coal fired power station is 40%. What mass of coal is used to produce electricity per year? c. If there is 800 billion tonnes of coal left in the earth...

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