Hello everyone, my professor posted some powerpoint presentations and this seems to be the only equation that seems relatively close to figure out the answer. But i'm confused on the information given and not given.(adsbygoogle = window.adsbygoogle || []).push({});

Here is the problem:

A string along which waves can travel is 3.60 m long and has a mass of 280 g. The tension in the string is 33.0 N. What must be the frequency of traveling waves of amplitude 7.70 mm in order that the average power be 85.0 W?

Here is the formula it looks like i'm going ot use:

Average power transmited per unit length = .5*vKA^2;

v i'm assuming is the velocity of the string, now K i think is suppose to be the wave #.

A is suppose to be the amplitude. But i don't see how i'm going to find the wave # or v with the given. ANd plus they are giving me infromatino about tension which isn't even in this equation. Any ideas?

I also can find linear density by taking .28 kg/3.60m = .07778.

Thanks!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Can someone tell me if i'm using the right method? More wave fun!

**Physics Forums | Science Articles, Homework Help, Discussion**