The answer is A
Hope that helps!
Answer:
The seismic refraction is a geophysical principle governed by Snell's Law. Used in fields of engineering geology geotechnical engineering and exploration geophysics, seismic refraction traverses are performed using a seismograph or geophone in an array and an energy source
Use the Pythagorean theorem to find the magnitude of the resultant, southeast vector. A squared plus B squared equals C squared, right?
<span>so, (south)^2 + (east)^2 = (southeast)^2 </span>
<span>(11.5)^2 + (18.3)^2 = (resultant)^2 </span>
<span>Resultant = 21.6 km/s</span>
Answer:
700 Hz
Explanation:
From the given information;
If we consider the formula for the frequency of an open-end tube; we have the formula:
![f_{op} = \dfrac{v}{2L}](https://tex.z-dn.net/?f=f_%7Bop%7D%20%3D%20%5Cdfrac%7Bv%7D%7B2L%7D)
For a closed-end tube;
![f_{closed}= \dfrac{v}{4L}](https://tex.z-dn.net/?f=f_%7Bclosed%7D%3D%20%5Cdfrac%7Bv%7D%7B4L%7D)
However, the fundamental frequency of open end tube can be expressed as:
![f_{op} = 2( \dfrac{v}{4L})](https://tex.z-dn.net/?f=f_%7Bop%7D%20%3D%202%28%20%5Cdfrac%7Bv%7D%7B4L%7D%29)
where;
![f_{closed}= \dfrac{v}{4L}](https://tex.z-dn.net/?f=f_%7Bclosed%7D%3D%20%5Cdfrac%7Bv%7D%7B4L%7D)
Then; the fundamental frequency of the open end tube is:
![f_{op} = 2( f_{closed})](https://tex.z-dn.net/?f=f_%7Bop%7D%20%3D%202%28%20f_%7Bclosed%7D%29)
= 2(350)
= 700 Hz