Question

a small cork with a excess charge of +6.0 μC
(1 μc = 10^-6 C) is placed 0.12 m from another cork, which carries a charge of -4.3 μC....

how many electrons are on the negative cork?

Answer 1

divide the charge by the charge on one electron. This does not change. The information on the positive cork, and distance, is a distractor, ignore it.

Answer 2

A small cork with an excess charge of +5.0 μC
is placed 0.12 m from another cork, which
carries a charge of −3.2 μC.
What is the magnitude of the electric force
between the corks? The Coulomb constant is
8.98755 × 109 N · m2/C2.
Answer in units of N.

Answer 3

A small cork with an excess charge of +6
.
0
μ
C
is placed 0
.
18 m from another cork, which
carries a charge of
−
3
.
2
μ
C.
What is the magnitude of the electric force
between the corks? The Coulomb constant is
8
.
98755
×
10
9
N
·
m
2
/
C
2
.
Answer in units of N