Explain optical telescopes?

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the hardest substance available on earth

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What is meant by geo- magnetism ?

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Which element has the lowest melting point?

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Explain the Uniform Velocity ?

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Why so coloured clothes sometimes fade in sunlight ?

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Explain the Solids ?

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What is the Electro magnet ?

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WHAT TI THE REASON FOR THE NOISE PRODUCED IN THE TRANSFORMER?

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laser is an acronym for light amplification by

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how does a basic rubber ink filler work?

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What generates seismic waves?

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