Can an air mattress float if filled with helium?
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No.
With 1 m³ of helium, you get about 1.1 kP of buoyancy at normal pressure – you'll hardly be able to get that into a lightweight air mattress, which "only" weighs about 1 kg. At overpressure, everything is worse anyway.
So:
Determining volume, calculating buoyancy, and making your own conclusions is always better than watching stupidly manipulated videos on tiki-toki….
So don't be gullible, but remember physics class.
All the best.
Yes, in principle, but it depends on how heavy the air mattress is and how much helium it can hold. Most air mattresses are probably too heavy for that, although, one could calculate.
Of course, if you lie down on it you won't float; a person weighs far too much for that.
No, an air mattress has far too little volume to be able to support a body and float simultaneously through air displacement according to the Archimedes' principle…
Well, if it's as big and light as a blimp, it might be possible. But you'd have to hang from the bottom with a hammock to prevent the helium mattress from tipping you over!
You need more volume.
How about a floating bouncy castle?
I saw a similar video on TikTok earlier
You should have looked at the physics textbook, that would have saved you from falling for clumsy fakes.
I didn't say that I believe it too
It's better…. ;-))