Class 9 physics Practice Tests
Class 9 Physics Online Tests
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MCQ 1: Plant or animal wastes that can be burnt as fuel is called
MCQ 2: The interconversion of matter and energy is predicted by
MCQ 3: In Einstein's mass-energy equation, c is the
MCQ 4: The relation between mass ‘m’, speed of light ‘c’ and energy ‘E’ can be written as
MCQ 5: Solar energy can also be converted directly into electricity by
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