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Class 9 Physics Study App | Efficiency Quiz e-Book PDF
Class 9 Physics MCQs (Grade 9) From Textbook
Class 9 Physics MCQs – Certification Test 316
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MCQ 316: The efficiency of the cyclist when he does 12 J of useful work from every 100 J of food energy he takes is:
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Efficiency Quiz App
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Class 9 Physics Quiz PDF Book
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