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Two protons 10^-15 m apart in a nucleus repel with an electric force near what value?
A2.3 N
B23 N
C230 N
D2300 N
Answer & Solution
Correct answer: C. 230 N
F = 9 x 10^9 x (1.6e-19)^2 / (1e-15)^2 is about 230 N, vastly more than their tiny gravitational pull.
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