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babymother [125]
3 years ago
12

Create a mathematical model for the pressure variation as a function of position and time for a sound wave, given that the wavel

ength of the wave is λ = 0.190 m and the maximum pressure variation is ΔPmax = 0.270 N/m2. Assume the sound wave is sinusoidal. (Assume the speed of sound is 343 m/s. Use the following as necessary: x and t. Assume ΔP is in Pa and x and t are in m and s, respectively. Do not include units in your answer.)
Physics
1 answer:
goblinko [34]3 years ago
3 0

Answer:

The equation of position and time for a sound wave is \Delta p=0.270(33.06 x-11342.40 t).

Explanation:

Given that,

Wavelength = 0.190 m

Maximum pressure \Delta P_{max}= 0.270 N/m^2

We know that,

The function of position and time for a sound wave,

\Delta p=\Delta p_{max}(kx-\omega t)....(I)

We need to calculate the frequency

Using formula of frequency

f=\dfrac{v}{\lambda}

Put the value into the formula

f=\dfrac{343}{0.190}

f=1805.2\ Hz

We need to calculate the angular frequency

Using formula of angular frequency

\omega =2\pi f

Put the value into the formula

\omega=2\pi\times1805.2

\omega=11342.40\ rad/s

We need to calculate the wave number

Using formula of wave number

k = \dfrac{2\pi}{\lambda}

Put the value into the formula

k=\dfrac{2\pi}{0.190}

k=33.06

Now, put the value of k and ω in the equation (I)

\Delta p=0.270(33.06 x-11342.40 t)

Hence, The equation of position and time for a sound wave is \Delta p=0.270(33.06 x-11342.40 t).

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