Velocity and momemtum of 10 Mev Electron

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Homework Statement



Find the velocit y and momentum of an electron (rest mass of 0.511MeV) with a
kinet ic energy of 10.0 MeV.

The Attempt at a Solution



The momentum I calculate using sqrt(2KEm) is giving me a V larger than the speed of light. This can't be true.

If I try
Rest E + KE = sqrt (m2c4 - p2c2) it gives me a negative root.
 
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Nevermind, I figured it out.
 

Thread 'Modeling a graph that shows age in relation to depth of an ice sample'

To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
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