Young’s modulus of steel is and its density is

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Young’s modulus of steel is

2.0\times10^{11}\,\text{N}\,\text{m}^{-2}

and its density is

8.0\times10^{3}\,\text{kg}\,\text{m}^{-3}

. Calculate the speed of longitudinal sound waves along a steel rail. (a)

1.4\times10^{4}\,\text{m}\,\text{s}^{-1}

(b)

5.0\times10^{3}\,\text{m}\,\text{s}^{-1}

(c)

3.5\times10^{3}\,\text{m}\,\text{s}^{-1}

(d)

8.9\times10^{3}\,\text{m}\,\text{s}^{-1}