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An atomic nucleus has a charge of +40e. An electron is 10-9 m from the nucleus. What is the...

An atomic nucleus has a charge of +40e. An electron is 10-9 m from the nucleus. What is the force on the electron?


A) 9.2 nN
B) 6.8 nN
C) 1000 C
D) 2.9 nN
E) 3.7 nN
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Answer #1
Force = k q1 q2 / r2 =
           =   8.99 x 109 * 40 *1.60 x 10-19 *1.60 x 10-19 / (10-9)2 =
           = 9.21 x 10-9 newtons =    9.2 nN
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