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2 years ago

Andy took a bus and then walked from his home to downtown. For the first 1.6 hour, the bus drove at an average speed of 15 km/h

Physics

2 answers:

qwelly [4]2 years ago

6 0

Answer:

1.6x15=24

=0.4x4.5=1.8

=24+1.8=25.8

=1.6+0.4=2

=25.8/2=12.9

Yuliya22 [10]2 years ago

4 0

<em>1.6x15=24 </em>

<em> </em>

<em>0.4x4.5=1.8 </em>

<em> </em>

<em>24+1.8=25.8 </em>

<em> </em>

<em>1.6+0.4=2 </em>

<em> </em>

<em>25.8/2=12.9</em>

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2 years ago

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3 years ago

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3 years ago

One string of a certain musical instrument is 70.0 cm long and has a mass of 8.79 g . It is being played in a room where the spe

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To solve this problem we will apply the concepts of linear mass density, and the expression of the wavelength with which we can find the frequency of the string. With these values it will be possible to find the voltage value. Later we will apply concepts related to harmonic waves in order to find the fundamental frequency.

The linear mass density is given as,

$\mu = \frac{m}{l}$

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$\mu = 0.01255kg/m$

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$\lambda = \frac{2}{3} l$

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$\lambda = \frac{2}{3} (70*10^{-2})$

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$f_s = \frac{v}{\lambda_s}$

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Now the velocity of the wave would be

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$v = \sqrt{\frac{T}{\mu}}$

$v^2 = \frac{T}{\mu}$

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PART B) The relation between the fundamental frequency and the $n^{th}$ harmonic frequency is

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$n=3$

Then,

$f_3 = 3f_1$

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$f_1 = \frac{f_3}{3}$

$f_1 = \frac{448Hz}{3}$

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2 years ago