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  4. The density of the material of a wire used in sonometer is 7.5 × 103 kg / m 3. If the stress on the wire is 3.0 × 108 N / m 2, the speed of transverse wave in the wire will be -

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Q. The density of the material of a wire used in sonometer is $7.5 \times 10^{3} kg / m ^{3}$. If the stress on the wire is $3.0 \times 10^{8} N / m ^{2}$, the speed of transverse wave in the wire will be -

Solution:

$d=7.5 \times 10^{3} kg / m ^{3}$
$s =3 \times 10^{8} N / m ^{2}$
That depends on $V =\sqrt{\frac{ P }{\rho}}$
$=\sqrt{\frac{3 \times 10^{8}}{7.5 \times 10^{3}}}$
$=200\, m / s$