73. We choose a coordinate system whose origin is at the center of the flat base, such that
the base is in the
xy
plane and the rest of the hemisphere is in the
z
> 0 half space.
(a)
(
)
2
2
2
2
ˆ
ˆ
k
k
(0.0568 m)
(2.50 N/C)
0.0253 N
m /C.
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 Spring '10
 Rebello,NobelS
 xy plane, entire hemisphere, −k ⋅ Ek, half space

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