Explanation:
(a) From E=
r
2
k
e
Q
Q=
k
e
Er
2
=
(8.99×10
9
N⋅m
2
/C
2
)
(8.90×10
2
N/C)(0.750m)
2
=5.57×10
−8
C
But Q is negative since
E
→
points inward, so
Q=−5.57×10
−8
C=−55.7nC
(b) The negatve charge has a spherically symmetric charge distribution, concentric with the spherical shell
It might be radiation and reflection but I’m not sure
The inner core is solid, while the outer core is liquid.
At maximum height, the velocity of the ball is 0.
v = u + at
0 = 34 - 32.2t
t = 1.06 seconds
In H(t), s = 0 because the ball is initially on the ground.
H(t) = -16(1.06)² + 34(1.06)
H(t) = 18.1 feet
