Posted by Rachel on Wednesday, February 16, 2011 at 11:42pm.
It is the question if you say it is.
Partially submerging the copper object will reduce the tension in the steel wire. There will be a buoyancy force equal to half the volume of the copper object multiplied by the density of water. Let V be the volume of the copper and g be the acceleration of gravity. The specific gravity of copper is 8.92, and that of water is 1.00.
Copper object weight = 8.92 V*g
Buoyancy force = 1.00*(V/2)*g = 0.50 V*g
Effective weight = 8.42 V*g
The tension T gets multiplied by a factor 8.42/8.92 = 0.9439.
The speed of waves in the wire AND the fundamental frequency get multiplied by the square root of this factor, or 0.9716.
The new fundamental frequency becomes
300*0.9716 = 291.5 Hz
That is about half of a half-tone on the musical scale.
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