• Support PF! Buy your school textbooks, materials and every day products Here!

Waves, pulses, sound and things of that nature

  • #1

Homework Statement



http://insight.ccsf.edu/file.php/4599/PDF/Exam1-Fall-2011.pdf

Homework Equations


v^2=T/μ
κλ=2∏
ω=2f and many more

The Attempt at a Solution


Starting with 1a the λ is 4/3*.015cm=.02cm since by the diagram the distance between the labeled point is 3/4 the wavelength

Now I'm not so sure about v. I don't think the diagram is used but in the given info in the statement. v=.3cm/.00075s right

And then the f is equal to v/λ right

I'll get to more later. I need to finish some astronomy homework real quick lol
 

Answers and Replies

  • #2
for f may need to use displacement=2*pi*f*t or more exactly 0.3cm=2*pi*f*.00075s actually. what do you think
 
  • #3
for 1b im thinking dU/dx equals zero at (Xa,t1) and (Xb,t2). I'm still thinking about the other two. i know dy/dt=-v*dy/dx but am not certain of the values of dy/dt or dy/dx. I have a suspicion that dy/dx may be .5 at those other points.
 

Related Threads on Waves, pulses, sound and things of that nature

  • Last Post
Replies
1
Views
2K
Replies
2
Views
959
Replies
2
Views
3K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
0
Views
8K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
5
Views
13K
  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
1
Views
22K
  • Last Post
Replies
1
Views
4K
Top