Comments by "ke6gwf - Ben Blackburn" (@ke6gwf) on "" video.

  1.  @haydentravis3348  helium is the most common tank pressurization gas. It can be stored at very high pressure and be surrounded by cryo without liquifying, it's stable at wide temperature changes, and most importantly, it's lightweight.
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  2. It would melt from the heat of friction.
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  3. About 3 Os of hardness
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