As per Gauss Law
Net flux through enclosed surface is

here through this hemisphere total flux will pass through two portions
1). from the curved surface
2). from flat circular base
so now we have

given that


now we have



Answer:
84.6 J
Explanation:
The work done by the force is given by

where
W is the work done
F = 15 N is the force applied
d = 6.0 m is the displacement
is the angle between the force's direction and the displacement
Substituting the numbers into the equation, we find

Answer:
Hhere is the other part of the question ; What is the net electric field due to these rods at the origin? (epsilon not = 8.85*10^-12)
net electric field = 3600N/C
Explanation:
The detailed calculation is as shwon below
The answer is A. Sees more intense wavelengths reaching the surface
I think the answer may be D- mechanical