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Why spacecraft is designed?

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How hydro power station works?

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Define focal length?

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What do you know about camera?

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What is centre of curvature ?

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What is spectrum?

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Write a detailed note on telescope

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Prove with the help of an experiment that photosynthesis takes place in a leaf.

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Why Robotic spacecraft are sent into space?

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How fission reaction produce electricity?

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Write two uses of compressed air.Write two uses of compressed air.

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Describe that living things depend on one another for food, shelter and protection.

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What are the new technologies developed on earth as a result of space exploration?

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What are rockets?

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Why telescopes have been sent into space?

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Define lens?

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What do know about sense of seeing?

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Describe with the help of an experiment to separate soluble from mixtures.

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What do you know about the spacecraft which can be used many times?

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What are physical quantities?

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