Posted by **sandhu** on Tuesday, October 19, 2010 at 5:32am.

A vibrating stretched string has length 31 cm, mass 19 grams and is under a tension of 38 newtons. What is the frequency of its 3rd harmonic?

If the source of the wave is an open organ pipe of the same length as the wire, what would be the frequency of the 4 th harmonic?

- physics -
**drwls**, Tuesday, October 19, 2010 at 8:53am
How about showing that you have made some effort of your own? Find the appropriate equation in your course materials instead of expecting someone else to do it for you. Someone will gladly critique your work.

The formula will require that you know the wave speed in the wire. That is

V = sqrt[(Tension)/(linear density)]

= sqrt[38N/(.019kg/.31m)] = 24.9 m/s

The harmonic number is determined by how many half-wavelengths there are in the wire's standing wave pattern. For the frequency, you will use

F*(wavelength) = V

## Answer This Question

## Related Questions

- physics - A vibrating stretched string has length 139 cm, mass 38 grams and is ...
- physics - The string on a violin has a fundamental frequency of 120.0 Hz. The ...
- Physics - A string is under a tension of 700.0 N. A 1.5 m length of the string ...
- Physics repost please help - The mass of a string is 6.0 x 10^-3 kg, and it is ...
- Physics - A string is fixed at both ends and vibrating at 120 Hz, which is its ...
- physics - Which one of these statements regarding standing waves on a string is ...
- Physics - The mass of a string is 6 grams, and it is stretched so that its ...
- Physics - Waves - he largest tension that can be sustained by a stretched string...
- PHYSICS -HELP - A traverse periodic wave described by the expression y=5sin (pi ...
- physics - A string has a linear density of 8.5*10^-3 kg and is under the tension...

More Related Questions