Carbon Nanotubes are so light that they float in airpic.twitter.com/AlHWeap8cm
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Any explanation for how a solid material is lighter than air?
Carbon Nanotubes have a "tensile strength" σ of about 60 Giga-Pascals
weighs about 20,000 Newtons
Most nanotubes are constructed with a cross sectional area of about 1nm²
It's just the buoyant force and the gravitational force are close to one another
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Isn’t that just a restatement of “lighter than air”?
My question is how could this occur in a solid material... -
Maybe I don't understand your question. Air is a fluid, as such things can "float" in it. Even solids, given the right relative densities, the same way that a "wood block" can float in water
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