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Define paper chromatography and explain it with the help of an experiment?

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Give two uses of pulleys?

asked Nov 27, 2018 in Science by danish (1.0m points)

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What are heavenly bodies?

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What do you know about GPS?

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What is meany by stored mechanical enrgy?

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Write the names of three instruments in which convex lens is used.

asked Nov 25, 2018 in Science by danish (1.0m points)

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Describe different kinds of pulleys in detail?

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Hiow sound travels more quickly in water than air?

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What is hydro-electric energy?

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How electricity is produced by wind enerhy?

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Why the supporting wall of a dam is built very broad at the bottom?

asked Nov 25, 2018 in Science by danish (1.0m points)

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What is fixed pulley?

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Give two applications of regular and diffused reflection in daily life?

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Why sound travel faster in solids ?

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How sound energy is produced?

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Explain the working of a bicycle?

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Write the name of parts of comet

asked Nov 28, 2018 in Science by danish (1.0m points)

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What is a satelite?

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Why things don't sink in " Dead Sea"?

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Define a mirror?

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