Why do sound waves travel at different speeds in each gas? (gases are : air,carbon dioxide, and helium)

Question

anonymous · Answer

@timo86m

anonymous · Answer

i guess it is the density of it.

theeric · Answer

Sounds like a good guess, @timo86m! What do you think, @QueenBee232

anonymous · Answer

I agree could you be a little more specific though?

anonymous · Answer

well the less space between atoms the less collisions the less sound.

samgrace · Answer

the bulk modulus of the medium effects the propagation speed of pressure waves, this is a ratio of density and fractional change in volume. Moduli is a fancy word for a unit of some kind e.g youngs modulus for a material's 'sterdyness'.

anonymous · Answer

awesome thank you!! :)

anonymous · Answer

I'm not sure who to give the medal to though :P

anonymous · Answer

I guess since timo answered first he should get it

anonymous · Answer

thank u!! :)