3 years ago

What are mechanical waves ?

1 answer:

7 0

Answer:

<h3>A mechanical wave is a wave that is an oscillation of matter and therefore, transfers energy through a medium...</h3>

<h3> hope it helps!!</h3>

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When the starter motor on a car is engaged, there is a 310 A current in the wires between the battery and the motor. Suppose the

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Answer:

Diameter will be 351.42 mm

Explanation:

We have given current flowing in the copper wire i = 310 A

Voltage drop across the wire V = 0.55 volt

We know that resistance is given by $R=\frac{V}{i}=\frac{0.55}{310}=0.00177\Omega$

Length of the copper wire l = 1 m

Resisitivity of the copper wire $\rho =1.72\times 10^{-8}\Omega m$

We know that resistance $R=\frac{\rho l}{A}$

$0.00177=\frac{1.72\times 10^{-8}\times 1}{A}$

$A=969.4545\times 10^{-8}m^2$

As area $A=\pi r^2$

$3.14\times r^2=969.4545\times 10^{-8}$

$r=17.57\times 10^{-4}m$

So diameter $d=17.57\times 10^{-4}\times 2=35.142\times \times 10^{-4}m$ = 351.42 mm

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What are mechanical waves ?​

What are mechanical waves ?