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Homework Statement:

In your experiment, you measure a total deflection of 4.12 cm when an electric field of 1.10×103V/m is established between the plates (with no magnetic field present). When you add the magnetic field as described in Part C, to what value do you have to adjust its magnitude B0 to observe no deflection?
Assume that the plates are 6.00 cm long and that the distance between them and the screen is 12.0 cm.
Express your answer numerically in tesla.
Relevant Equations:

deltaY = eE0d(d+2L)/2m(v0)^2
V0 = E0/B0
I've attached a picture from the problem, the given equations, and my work so far.
I knew I had a problem when My units wouldn't check out. This should just be simple algebra but It's not working. Please help me to understand what I am doing wrong.
I knew I had a problem when My units wouldn't check out. This should just be simple algebra but It's not working. Please help me to understand what I am doing wrong.
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