1. I need some clarification that I answered this question properly(adsbygoogle = window.adsbygoogle || []).push({});

What is the wavelength of an electron of energy 5.0 eV?

Would I just use E=mc^2 to find the mass and then wavelength = h / mv to find the wavelength?

2. This question is also giving me problems

By what potential difference must a proton (Mo = 1.67 * 10^-27 kg) be accelerated to have a wavelength of 0.0011 nm?

Would I first use v = h / m * wavelength to find the velocity? And then

eV = 1/2 mv^2 to find the voltage?

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# Homework Help: Wavelength of Electron questions

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