New to the physics thing and toldly lost help please

[boomerwilliam]

Homework Statement

the speed is doubled and the freq stays the same what happens to the wave length?


this is my frist day in this class and i have no idlea where to go with this if someone could help me though this and tell me how to fig stuff like this out it would be great

Homework Equations

The Attempt at a Solution

 

[rl.bhat]

The characteristics of the waves are
frequency, wavelength, velocity,amplitude and phase.
Can you find a relation between these quantities?

 

[boomerwilliam]

um no i know i sound really dumb right now and i am in this stuff but if your asking for a graph there isn't one the qestion only has the speed doubles the freq stays the same and what happens to the length i don't know where to start to figure this out i am sorry i am not askin you to do it for me i am just askin for help on how to do it so i can figure this stuff out

 

[rl.bhat]

The relation between frequency, wavelength and velocity is
v = f*λ.
Ιn this equation, if frequency remains constant, how does the wavelength varies with velocity?

 

[boomerwilliam]

i think that it would get longer i am so lost thanks for trying to help me i think i am just going to go talk to the teacher tomorrow

 

[rl.bhat]

i think that it would get longer i am so lost thanks for trying to help me i think i am just going to go talk to the teacher tomorrow

Yes. It doubles.

 

[boomerwilliam]

so if the speed or velocity doubles and the wavelength stays constant then the frequency would be halfed?

 

[cepheid]

so if the speed or velocity doubles and the wavelength stays constant then the frequency would be halfed?

No, the frequency would not be halved. It would be doubled. Start from this equation:

v = fλ​

and ask yourself, if I am going to double the velocity (on the left hand side), how would I change the frequency (on the right hand side), given that the wavelength (lambda) must remain constant?