How Medium & Temperature Affect Sound Waves: Frequency, Wavelength & Speed

[UNknown 2010]

Homework Statement

(1) A sound wave is traveling through air medium, if the medium is replaced by water, how that will affect the wavelength, frequency and speed of the wave ?

(2) If the temperature of the air changed, how that will affect the wavelength, frequency and speed of the wave ?

Homework Equations

Velocity = Frequency × Wavelength

Velocity of sound wave in air = 331.5 m/s + 0.6 T

The Attempt at a Solution

(1) If the medium is replaced by water, which has greater density, the velocity increases. From the equation: Velocity = Frequency × Wavelength

Frequency or wavelength or maybe both frequency and wavelength must be increased, Could you tell me which one ?

(2) If temperature changed, velocity will be changed, so that frequency or wavelength must be changed. Could you tell me which one of them will change ?

 

[thebigstar25]

well, you know that the speed of sound in a specific medium should be (roughly speaking) a constant ..

you tell me, does it matter to know whether the frequecy is the one which changed or the wavelength?