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## Homework Statement

If the uncertainty in the location of a nonrelativistic particle is about equal to twice its de-Broglie wavelength, show that the uncertainty in its velocity is greater than about 4% of its velocity.

## Homework Equations

ΔpΔx>h/4Pi

p=mv

Δx=2nλ

## The Attempt at a Solution

I've put the above equations together and manipulated them but I'm not really sure how to get to, Δv>0.04v using the above formulae. An indication of where to begin would be greatly appreciated.