An electron is sent at high speed toward a gold nucleus (charge +79e) .What is the electrical force acting on the electron when it is 3.0 × 10−13 m away from the gold nucleus? (e = 1.6 × 10−19 C,ke = 8.99 × 109 N·m2/C2)
A) 2.1 × 10−6 N
B) 2.0 × 10−4 N
C) 0.20 N
D) 20 N
Correct Answer:
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