• Question: what are dewers

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      Asked by 352grcb52 to Sarah on 10 Mar 2015.
      • Photo: Sarah Kirk

        Sarah Kirk answered on 10 Mar 2015:

        They are basically the same thing as thermos flasks. They keep cold things cold and hot things hot, using a layer of vacuum to prevent heat from getting in or out. This is how the liquid nitrogen stays cold.
        Also, I’ve realised I spelt it wrong, it’s ‘dewar’. Will go correct that now, thanks!

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