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pat666
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Homework Statement
A wire of material having density of 8.0 g.cm-3 is stretched so that its length is increased by 0.10%. The fundamental frequency of transverse vibrations of a part of the wire 50.0 cm long is then 150 Hz. Calculate:
(a) the velocity with which a transverse wave is transmitted along the stretched wire,
(b) the tension per unit area of cross-section of the wire,
(c) Young’s modulus for the material of the wire.
Homework Equations
The Attempt at a Solution
I have solved this--- a) is simple the wave length is 0.5*2 therefore the velocity is 150m/s
b) it says per unit area of cross section. however i have rho times Area = mu which ends up giving me a Tension by unit area of 1.8*10^8n*m^2 not per if you get what i mean
c) is simple enough F/A=deltaL/L * Y the Area cancels (suggesting my answer for b is right) and so do the L's leaving a youngs modulus of 1.8*10^9
can someone do this and see if they agree with me please...