Class 9 Physics MCQs (Grade 9) From Textbook
Work and Energy Quiz App Free Download | Class 9 Physics e-Book PDF
Class 9 Physics Certification MCQs – Practice Test 11 (Chapter 9)
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The energy that comes from the Sun is called
The work done will be zero if the angle between the force and distance is
Electric generators convert mechanical energy into
1 horse power is equal to
An body builder does 15 Joules of useful work from every 60 Joules of food energy which he takes. His efficiency will be
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