Webassign Find Strength of Magnetic Field using Java App

[SchrodingersMu]

Homework Statement

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)

Homework Equations

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

The Attempt at a Solution

see picture for my work. I don't see what I am doing wrong.

 

[BvU]

Hello Erwin,
Wow, you sure have a wide screen. Doesn't prevent you from falling into the trap of forgetting to use proper units. Your expression for B is quite correct. Convert one of the factors to SI units and you are in business.

Hint: 78 T is incredibly huge for a magnetic field strength.