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Coulomb's law or Coulomb's inverse-square law, is a law of physics that describes force interacting between static electrically charged particles. In its scalar form the law is:
F=k*(q1*q2)/r^2
where k is Coulomb's constant (k = 8.99×109 N m2 C−2), q1 and q2 are the signed magnitudes of the charges, and the scalar r is the distance between the charges. The force of interaction between the charges is attractive if the charges have opposite signs (i.e. F is negative) and repulsive if like-signed (i.e. F is positive)，

物理英文基本詞匯可以在這里下載：
http://www.gaoyang168.com/bbs/viewthread.php?tid=11125436&pid=1#pid1
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找本大學(xué)物理方面的英文教科書看一下吧。比如：Unversity Physics :https://vdisk.weibo.com/s/zzucSSZnhAs7i

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