Answer:
T= 0.45 sec
Explanation:
Given data:
length of steel wire = 25 m
length of copper wire is 50 m
tension = 145 N
STEEL AND COPPER WIRE diameter = 0.450
density of steel [tex]= 7.86\times 10^{3} kg/m3[/tex]
density of copper [tex]= 8.92\times 10^3 kg/m3[/tex]
we know that speed of waves is calculated as
[tex]V =\sqrt{\frac{T}{U}}[/tex]
[tex]U = \rho \times A[/tex]
[tex]V_{STEEL} = \sqrt{\frac{145}{8.92\times 10^3 \times \pi (0.45\times 10^{-3})^2}}[/tex]
[tex]V_{STEEL} = 160 m/s[/tex]
[tex]V_{copper} = \sqrt{\frac{145}{7.86\times 10^3 \times \pi (0.45\times 10^{-3})^2}}[/tex]
[tex]V_{copper} = 170 m/s[/tex]
time travel by wave from one end to other
[tex]=\frac{l_s}{v_s} + \frac{l_c}{v_c}[/tex]
[tex]= \frac{25}{160} + \frac{50}{170}[/tex]
T= 0.45 sec
