Thursday

October 30, 2014

October 30, 2014

Posted by **Susan** on Thursday, March 4, 2010 at 12:00pm.

__________________ <- A vibrating wire which is 4cm long

Diameter= 0.0002m

Frequency= 2500Hz

density of carbon steel= 7700kg/m3

How do i find the tension of this wire?

This is some of the equations which we should be using: v= √T/µ, v=fλ, f=(n/2l) *(√T/µ)

- As Physics -
**drwls**, Thursday, March 4, 2010 at 12:32pmYou need to derive the wave speed in the wire, v, from the mode picture and the frequency, f . Once you know the wave speed, use the equation

v= √(T/µ),

to get the tension, T.

µ is the mass per unit length, which you can get from the density and diameter.

µ = (pi d^2/4)*(density)

You also need the wavelength, λ, and that depends upon the number of nodes, n. I can't see wnhat n is from your straight line sketch.

Your equation f=(n/2l) is wrong. That is the equation for wavelength, λ .

**Answer this Question**

**Related Questions**

physics - Find the diameter of an 18 m(L) long steel wire that will stretch no ...

physics - What hanging mass will stretch a 1.6 meter long, 0.66cm diameter steel...

physics - A light rigid bar is suspended horizontally from two vertical wires, ...

physics - A light rigid bar is suspended horizontally from two vertical wires, ...

physics - A mass of 12.7 kg is hanging by a steel wire 1.02 m long and 1.12 mm ...

physics - A large rock that weighs 164.0 N is suspended from the lower end of a ...

Physics - A copper wire of diameter 0.30mm and length 1.50m is joined to ...

physics - A stretched wire vibrates in its fundamental mode at a frequency of ...

college physics - A 4m long copper wire has a diameter of 2mm and carries a ...

physics - steeel and silver wire of the same diameter and same length are ...