3 ms·

> If it's lighter than air, doesn't it float away? You are confusing density with buoyancy.

• Stratoscope 14y ago
  Can you explain a bit more and help me with my confusion? Thanks!
  • deleted 14y ago
    [deleted]
  • jpdoctor 14y ago
    Simply: Buoyancy is the result of a difference in weight when one less dense material displaces another. What is the displacement of the aerographite samples? The article doesn't say, but the samples are small enough that I'd guess the forces of moving air (breathing near the sample) is more problematic than forces of buoyancy.