Homework 21.7
Figure 21-23
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In Fig. 21.23, three charged particles lie on an x axis.
Particles 1 and 2 are fixed in place. Particle 3 is free to
move, but the net electrostic force on it from
particles 1 and 2 happens to be zero.
If L23 = L12,
what is the ratio q1 / q2 ?