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## Homework Statement

The problem is at

http://dl.getdropbox.com/u/175564/physicsSpeedParticles.JPG [Broken]

## Homework Equations

The following equations may be useful

E = .5 mc^2

E = Bev

## The Attempt at a Solution

The right answer is (a).

However, I am unsure how it is obtained.

For example, by comparing the energies of the two particles, we get only

(v1 / v2)^2 = (E1 / E2) * 2/167

where the energies are unknown.

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