If significant amounts of fossil fuels continue to be used to support energy needs, what will be a negative impact for our planet?
A. a decrease oxygen levels, leading to lower air quality
B. increased air pollution, leading to better human health
C. decreased water quality, leading to increases in marine diversity
D. increased levels of carbon dioxide, leading to warmer global climates
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Ответ:
C)86 J of energy for every 100 J that enter it.
Explanation:
Efficiency is a measure of performance of an engine which can be calculated by the formula as given below to get in percentage:
Efficiency = energy output/energy input x 100
If the efficiency of a car’s engine is 14 percent it means that for every 100 joules of energy that is entered into it, only 14 joule is converted into useful output and rest of the 86 Joules is wasted.
The efficiency of any machine is never 100%, however, if any machine miraculously converts all the input energy to useful output energy, it means it is 100% efficient.
Hope it helps!