Waves, finding frequency, wavelength, and speed

  • Thread starter aliaze1
  • Start date
  • #1
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I am assigned the even problem for homework, but I am lost, so I found an odd problem with the same type of question and has the answer.... I just need to know how the calculations are done

Homework Statement



The displacement of a wave traveling in the negative y-direction is D(y,t)=(5.2cm)sin(5.5y+72t), where y is in m and t is in sec. Find the frequency, wavelength and speed of the wave

Homework Equations



D(x,t) = A sin[2π (x/λ -t/T) + Φ]

The Attempt at a Solution



I have no clue, the answers are:

11.5 Hz
1.14 m
13.1 m/s
 

Answers and Replies

  • #2
100
0
Well I'll help get you started.

By comparing the two equations, you know that

[tex]5.5 = \frac{2\pi}{\lambda}[/tex]

So you can easily find the wavelength.

How can you find the frequency in a similar manner? What is the relationship between frequency and period? When you have the frequency and wavelength, what is the relationship between those and velocity?
 
  • #3
174
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Thanks!
 
Last edited:

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