Why is it easier to walk on soft sand if we have flat shoes rather than shoes with sharp heels (or pencil heels)?
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What is change in state of motion? What brings change in state of motion?
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What is pressure? What is the relation of pressure with area on which it is applied?
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What are the advices of PCRA to save petrol/diesel while driving?
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The burning of fossil fuels causes air pollution. Explain.
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