3 ms·
It's probably "evacuated" as well, ie there's no internal air. You can get the weight inside a vacuum so it doesn't float away.
by ehsanu1 14y ago
It's probably "evacuated" as well, ie there's no internal air. You can get the weight inside a vacuum so it doesn't float away.
- Ralith 14y agoIf you RTFA, you see there's a video of them sitting on a table in regular atmosphere. You'll also see that it's just basically a very fine carbon hairball. They're obviously measuring the density of the thing itself, and not the air that happens to be drifting through the gaps.
- SilasX 14y agoWhich is to say, they're counting the air passing through the gaps for purposes of volume but not mass in the density calculation. So, could I claim to have the lightest material if I made a hollow, porous, giant hairball?
- ThePherocity 14y agoObviously, yes. You just need to find a way to get the density of the evacuated hairball to 0.1 mg/cm3. Duh! ;)
- sigkill 14y agoAs someone who has worked with metal foams, you are technically correct.