1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Speed of sound

  1. Oct 1, 2014 #1
    Hi all.
    How does the speed of sound change with the medium? That is, how does it change with density, molar mass, temperature and in air, humidity. It seems that denser materials would increase the speed of sound, since the particles are more closely packed and therefore ease vibrations. The speed would decrease if molar mass increased, because the mass of one molecule would be higher for a higher molar mass, and therefore would be harder to accelerate, slowing down propagation. The speed would increase with temperature, since particles would be mooing faster but I'm not sure if would increase as temperature decreased, as when temperature decreases the density increases. Finally, I would think the speed would increase with humidity, as there are more closely packed particles. Are my suppositions wrong? Thanks for any answers
  2. jcsd
  3. Oct 1, 2014 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

  4. Oct 1, 2014 #3
    Thanks, the information is useful
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook