Answer:
E = 31.329 N/C.
Explanation:
The differential electric field 
at the center of curvature of the arc is
<em>(we have a cosine because vertical components cancel, leaving only horizontal cosine components of E. )</em>
where 
is the radius of curvature.
Now
,
where 
is the charge per unit length, and it has the value
Thus, the electric field at the center of the curvature of the arc is:
Now, we find 
and 
. To do this we ask ourselves what fraction is the arc length 3.0 of the circumference of the circle:
and this is
radians.
Therefore,
evaluating the integral, and putting in the numerical values we get:
The answer is B I hope this helps luv
red goes to red, black goes to white, yellow goes to green, blue goes to blue.
<span>D) Electromagnetic radiation travels in the form of longitudinal waves.</span>
I believe that the answer to this would be B
Hope this helped
