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demonstrations:9_equipment:liquid_nitrogen_dewar:start [2019/03/04 18:53] demoroom |
demonstrations:9_equipment:liquid_nitrogen_dewar:start [2019/03/04 18:54] demoroom |
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Liquid nitrogen can be stored in the Dewar for a surprisingly long time, but it does gradually boil off. (The insulation is very good but obviously not perfect. A small amount is continually vaporized so the liquid remains below the boiling point.) | Liquid nitrogen can be stored in the Dewar for a surprisingly long time, but it does gradually boil off. (The insulation is very good but obviously not perfect. A small amount is continually vaporized so the liquid remains below the boiling point.) | ||
- | <WRAP center round important 40%> | + | <WRAP round important 40%> |
- | Use gloves and goggles at all times while working with liquid nitrogen. The Leidenfrost effect means that small quantities will roll harmlessly across your skin, but if any is allowed to soak into fabric or pool on your skin, you may suffer severe frostbite. | + | Use gloves and goggles at all times while working with liquid nitrogen. The Leidenfrost effect means that small quantities will roll harmlessly across your skin, but if any is allowed to soak into fabric or pool on your skin you may suffer severe frostbite. |
</WRAP> | </WRAP> | ||