Physics: A25.0 steel wire and a 50.0 copper wire are attached end to end and stretched to a tension of 145 . both wires have a radius of 0.450 . and their densities are 7.86 10 / for the steel and 8.92 10 / for the copper. (note that these are mass densities, mass per unit volume, not linear mass densities, mass per unit length.) how long does a wave take to travel from one end to the other of the combination wire?

A25.0 steel wire and a 50.0 copper wire are attached - id2505003507906, alexandroperez13

Ответ:

NikkiZoeller

08.01.2022

Physics

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 $= 7.86\times 10^{3} kg/m3$

density of copper $= 8.92\times 10^3 kg/m3$

we know that speed of waves is calculated as

$V =\sqrt{\frac{T}{U}}$

$U = \rho \times A$

$V_{STEEL} = \sqrt{\frac{145}{8.92\times 10^3 \times \pi (0.45\times 10^{-3})^2}}$

$V_{STEEL} = 160 m/s$

$V_{copper} = \sqrt{\frac{145}{7.86\times 10^3 \times \pi (0.45\times 10^{-3})^2}}$

$V_{copper} = 170 m/s$

time travel by wave from one end to other

$=\frac{l_s}{v_s} + \frac{l_c}{v_c}$

$= \frac{25}{160} + \frac{50}{170}$

T= 0.45 sec

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Ответ:

cuavang55

30.09.2022

Physics

the most accurate qualitative description of the magnetic field vector B inside the cylindrical resistor is "The magnetic field vector points radially away from the axis of the cylinder."

Explanation:

A magnetic field is a vector field that describes the magnetic influence of electric charges in relative motion.

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