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How powerful a lens would a magnifying glass need to have to burn metal 9cm away?
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Can you mix molten metal and molten salt?
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Just read "Evolution Through the Looking Glass", I do not agree...
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Does glass absorb extra heat in a microwave,continuing to heat water afterwards?
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Why would you burn coal, then turn the carbon dioxide back into "coal"? |
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MOVED: Can I take Zinc from filling pure zinc metal
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