(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the radius of the orbit of an electron travelling at 9.0E6 m/s around a zinc nucleus(which contains 30 protons)?

2. Relevant equations

F=(kQq)/r^2

F=QE

ac=v^2/r

Fnet=ma

3. The attempt at a solution

30 protons x 1.6E-19 = 4.8E-18 C

electron - 1.6E-19 C

F=ma

F=(9.11E-31)a

a=v^2/r

F=[(9.11E-31)(9.0E6)^2]/r

F=7.38E-17/r

(7.38E-17/r)=[(9.0E9)(1.6E-19)(4.8E-18)]/r^2

r=9.367E-11 m

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# Homework Help: Electrostatics calculation help

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