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Why is electricity dangerous?

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How a supernova becomes neutron star?

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Define ultrasound waves?

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Define black hole?

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When supergiant becomes supernova?

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What is meant by prostar?

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How a longitudnal wave form?

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Which stars are known as massive stars?

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What is the composition of elliptical galaxies?

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What's beyond our solar system?

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How does current flows?

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How wave travel from one place to another?

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What are the types of waves?

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What are the types of electric circuits?

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Describe an experiment by which high and low pitch sounds can be produced?

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Explain Big Bang theory?

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