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2 years ago

8

In music, the note G above middle C has a frequency of about 392 hertz. If the speed of sound in the air is 340 m/s, what is the

approximate wavelength of this note?(1 point)
1.2 meters

8.7 meters

0.87 meters

0.0026 meters

1 answer:

morpeh [17]2 years ago

7 0

Answer:

0.87 meters

Explanation:

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A wire 3.22 m long and 7.32 mm in diameter has a resistance of 11.9 mΩ. A potential difference of 33.7 V is applied between the

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Answer:

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$A=\pi r^2=3.14\times 0.00366^2=4.20\times 10^{-5}m^2$

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$J=\frac{2831.93}{4.20\times 10^{-5}}=8.40A/m^2$

(c) Resistance is equal to

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$11.9\times 10^{-3}=\frac{\rho \times 3.22}{4.20\times 10^{-5}}$

$\rho =15.52\times 10^{-9}ohm-m$

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