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**If a subatomic particle is moving with an energy equal to 240. mev, what is the frequency associated with this particle ?**

**E=hv where E = energy of the particle, h = planck's constant and v = frequency**

**I thought I would solve this by first converting MeV into joules, and then using the equation E=hv to solve for the frequency. However, it seems that was incorrect :(. Maybe my math was incorrect, but I think I'm missing something. I think because the particle is in motion, velocity may be a factor? I'm not exactly sure. Thanks in advance for your help.**