Webassign Find Strength of Magnetic Field using Java App

1. The problem statement, all variables and given/known data

A 10nC, 1µg particle is fired into a magnetic field as shown. Distances are in millimeters, time is in seconds. What is the strength of the field? (See my picture for additional information and my worked solution)

2. Relevant equations
f= mv^2 /r F(from B field) = qvb

3. The attempt at a solution
see picture for my work. I don’t see what I am doing wrong.


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