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!

Homework Help: Need help with this question on sound please! new member!

  1. Nov 19, 2008 #1
    Need urgent help with this question on sound please! new member!

    1. The problem statement, all variables and given/known data

    The intensity of sound at the minimum threshold of hearing is 1*10^-12 W/m^2. A listner hears a 115 dB sound as an automobile passes by at a distance of 9.0 meters.
    a) what is the sound intensity in W/m^2 ?

    b) About how much power is the car dissipating into sound waves?
     
  2. jcsd
  3. Nov 19, 2008 #2

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: Need urgent help with this question on sound please! new member!

    Welcome to Physics Forums.

    You seem to have missed out two important sections of the homework template.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook