Question

PLZ HELP ME!!!!!!!!

Answer 1

Each problem is worth 4 points.  Make sure you show your work! 

1.     A note has a wavelength of 0.77955 m. If the speed of sound is 343.00 m/s, what pitch is this note?

f = (343m/s) / 0.77955m = 439.997 0r 440 Hz Pitch is an A.

 

2.     A note has a wavelength of 0.52028 m. If the speed of sound is 343.00 m/s, what pitch is this note?

f = (343 m/s) / 0.52028m = 659.26 Hz Pitch is an E

 

 

3.     A note has a wavelength of 0.65552 m. If the speed of sound is 343.00 m/s, what pitch is this note?

f= (343 m/s)/0.65552m = 523.25 Hz Pitch is a C

 

 

4.     A D note has a frequency of 587.33 Hz. Calculate its wavelength in meters.

λ= (343 m/s)/587.33Hz = 0.584 m

 

5.     A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

λ= (343 m/s)/493.88Hz=0.6945m

Answer 2

Answer:

1.     Frequency = speed / wavelength

here we know

speed = 343 m/s

wavelength = 0.77955 m

now frequency is given by  

$f = \frac{343m/s}{ 0.77955m}$

f = 440 Hz  

2.     Frequency = speed / wavelength

here we know

speed = 343 m/s

wavelength = 0.52028 m

now frequency is given by  

$f = \frac{343m/s}{ 0.52028m}$

f = 659.3 Hz

3.     Frequency = speed / wavelength

here we know

speed = 343 m/s

wavelength = 0.65552 m

now frequency is given by  

$f = \frac{343m/s}{ 0.65552m}$

f = 523.25 Hz  

4.     Wavelength = speed / Frequency

here we know

speed = 343 m/s

Frequency = 587.33 Hz

now wavelength is given by  

$\lambda = \frac{343m/s}{587.33}$

$\lambda = 0.584 m$    

5.     Wavelength = speed / Frequency

here we know

speed = 343 m/s

Frequency = 493.88 Hz

now wavelength is given by  

$\lambda = \frac{343m/s}{493.88}$

$\lambda = 0.6945 m$    

6.     Wavelength = speed / Frequency

here we know

speed = 343 m/s

Frequency = 698.46 Hz

now wavelength is given by  

$\lambda = \frac{343m/s}{698.46}$

$\lambda = 0.491 m$    

7.     Frequency = speed / wavelength

here we know

speed = 343 m/s

wavelength = 0.5840 m

now frequency is given by  

$f = \frac{343m/s}{0.5840m}$

f = 587.3 Hz  

8.     Frequency = speed / wavelength

here we know

speed = 343 m/s

wavelength = 0.4375 m

now frequency is given by  

$f = \frac{343m/s}{0.4375m}$

f = 784 Hz  

9.     Wavelength = speed / Frequency

here we know

speed = 343 m/s

Frequency = 783.99 Hz

now wavelength is given by  

$\lambda = \frac{343m/s}{783.99}$

$\lambda = 0.4375 m$    

10.  Wavelength = speed / Frequency

here we know

speed = 343 m/s

Frequency = 659.26 Hz

now wavelength is given by  

$\lambda = \frac{343m/s}{659.26}$

$\lambda = 0.520 m$