There's an effect called The Doppler Effect, that's the "up and down" sound.
That frequency is 1.8mm and 115 per minute.
(Hope this helped.)
<span>A Landsat satellite records reflected wavelengths from Earth's surface<span /></span>
Explanation:
Formula to calculate the electric potential is as follows.

Putting the given values into the above formula as follows.

= ![\frac{9 \times 10^{9}}{0.25}[\frac{-3.3}{\sqrt{2}} + 4.2] \times 10^{-6}](https://tex.z-dn.net/?f=%5Cfrac%7B9%20%5Ctimes%2010%5E%7B9%7D%7D%7B0.25%7D%5B%5Cfrac%7B-3.3%7D%7B%5Csqrt%7B2%7D%7D%20%2B%204.2%5D%20%5Ctimes%2010%5E%7B-6%7D)
= 
Hence, electric potential at point A is
.
Now, the electric potential at point B is as follows.

= ![\frac{9 \times 10^{9}}{0.25} [-3.3 + \frac{4.2}{\sqrt{2}}] \times 10^{-6}](https://tex.z-dn.net/?f=%5Cfrac%7B9%20%5Ctimes%2010%5E%7B9%7D%7D%7B0.25%7D%20%5B-3.3%20%2B%20%5Cfrac%7B4.2%7D%7B%5Csqrt%7B2%7D%7D%5D%20%5Ctimes%2010%5E%7B-6%7D)
= 
Hence, electric potential at point B is
.