Here’s a question I had regarding a statement made in the thread of helium changing your voice…
“Helium is significantly less dense than air. As a result, the speed of sound is much higher in helium.”
Now my years of physics this sound counter intiutitve, as speed travels FASTER in denser objects, not in LESS dense objects.
Bang a metal pole sound zips down it faster than through air.
If you take an extreme case of a infintesimally low density, you get a slower speed (think vacuum of space, speed of sound = 0 )