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

One method for determing masses of heavy ions involves timing their orbital period in a known magnetic field. What is the mass of a singly charged ion that makes 7.0 revolutions in 1.3 x 10^-3 seconds in a 4.5 x 10^-2 T field.

a) 2.1x10^-25 kg

b) 1.3x10^-24 kg

c) 6.5x10^-23 kg

a) 5.0x10^-20 kg

2. Relevant equations

I'm not sure of which equation to use. Maybe....

Fc = Fb

m4(pi^2)r/T^2 = QvB

3. The attempt at a solution

m4(pi^2)r/(1.3x10^-3s/7)^2 = Qv(4.5x10^-2)

This might be the wrong formula.

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# Magnetism and Centripetal force question

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