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My Answered Questions
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do you know things about physics and outer space?
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how much is steel to the ton and what is it good for/what are its properties?
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what do catylist converters in cars actually do and where else are they used and are they expensive?
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what is outside our universe?
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if space is a vacuum then what is expanding?
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how much are semiconductors and whn are they used/what are they used in?