Explore BrainMass
Share

# Sound intensity, Speed of waves on the string

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

1. The intensity of sound 20 meters from a race car is 0.0100 W/m^2.
(A) What is the sound intensity level in dB?
(B) What would the intensity (in W/m^2) be at a distance 80 m from the car? Find the corresponding intensity level in dB.

2. Suppose a violin player touches the "A" string 1/3 of the distance from the end, which produces a harmonic as shown. The length of an "A" string is 45 cm, and its fundamental frequency is 440 Hz.
(A) Find the frequency heard.
(B) Find the speed of waves on the string.

https://brainmass.com/physics/sound-hearing/sound-intensity-speed-waves-string-65749

#### Solution Preview

The solution is attached in two files that are identical in content, only differ in format. The first is in XP MS Word format, while the other is in Adobe Pdf format. Therefore you can choose the format that is most suitable to you.