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How compound machines are different from simple machines?

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Define law of conservation of enrgy

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How electricity is produced by wind enerhy?

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What is plasma?

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Define solubility?

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What do you know about biogas?

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When gear system increase the speed ?

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What is a solution?

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What are tha advantages of hydro-electic energy?

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What is fixed pulley?

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Name the world's largest solution?

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What is meant by conversion of energy?

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Define gravitational energy?

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How can you cause more solid solute to be dissolved in a liquid?

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Why do the words "Shake well before use" on a bottle of medicine indicate that the medicine is a suspension?

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What do you know about gear train?

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What is major source of light energy?

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What is a windmill?

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Write advantages of wind energy?

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A doorknob is a wheel and axle .How does it work?

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