In the use of coal to produce energy, which of the following does NOT decrease the energy efficiency of theprocess?a. extracting the coal from the groundb. waste heatc. cogenerationd. energy required to build the power plante. the removal of the waste products

From the power plant, it took 100 kJ of coal to produce the 15 kJ of useful energy in your home.  What is the total efficiency?

Wind power and coal are resources used to generate electricity.Describe two advantages of using wind power instead of coal to generate electricity

14. How much of the energy in burning coal reaches the consumer as electricity?

Context: Fossil fuels are nonrenewable resources because they took millions of years to attain their present form.We use fossil fuels such as coal, oil, and gas to heat our houses, run industry, and transport. They are usually hydrocarbons (compounds of carbon and hydrogen). When they are burnt, they combine with oxygen from the air. The carbon becomes carbon dioxide; hydrogen becomes hydrogen oxide called water; while energy is released as heat. In the case of coal:Carbon + Oxygen      →→  carbon dioxide + heat energyHydrocarbon + Oxygen    →→   carbon dioxide + water + heat energy

Which statement BEST explains why nuclear energy might be a preferred energy source over coal if uranium is considered a nonrenewable resource?A Mining uranium is associated with low hazards.B Uranium produces nuclear waste while coal does not.C Uranium produces higher carbon dioxide emissions.D A small amount of uranium produces a larger amount of energy.