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26.12.2019 •
Physics
What is the efficiency of a tractor that has a work output of 300j and a work input of 400j
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Ответ:
= 75 %
Explanation;To measure efficiency of a machine, compare the work output to work input.
Efficiency = Work output/ work output × 100 %
= 300/400 × 100
= 75 %
Ответ:
C) to abolish the practice of slavery within the United States.