SAT Physics MCQs – Certification Test 244

Energy in Physics Quiz (Question 244) – App & e-Book Download

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MCQ 244: The ratio for the efficiency of a machine is:

(useful energy output + energy input) × 100&percent;
(useful energy output - energy input) × 100&percent;
(useful energy input / energy output × 100&percent;
(useful energy output / energy input) × 100&percent;

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