Chapter 9: Class 9 Physics Exam Tests
Class 9 Physics MCQs - 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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