Sorry but you tell me not to ask for help or answers but you want them yourself
We have that the Throw has changed in distance the ball has traveled and the Force applied in trowing the ball and Possibly the time of travel
From the Question we are told that
You toss a ball to someone one meter away
You toss it to someone four meters away
Generally
When you toss toss a ball to someone one meter away and You toss it to someone four meters away the are things that have changed
Therefore
The Throw has changed in distance the ball has traveled and the Force applied in trowing the ball and Possibly the time of travel
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Answer:

Explanation:
The differential electric field
due to differential charge
at distance
from the origin is

but since
we have


integrating this from
to
we get

![E = 4k[(x_0+L)-x_0]](https://tex.z-dn.net/?f=E%20%3D%204k%5B%28x_0%2BL%29-x_0%5D)

putting in
and
we get

Recall that given the velocity and wavelength, frequency can be computed as

Substituting the given values, we have
Answer: 477 Hz