Electron...achievable resolution??? 1. The problem statement, all variables and given/known data An electron is confined inside a sphericial region of diametre 1.5nm.The speed of the electron is measured. Which of the following is not an achieveable resolution for the measurement? A +/- 9.7*10^3 ms^-1 B +/- 3.86*10^4ms^-1 C +/- 7.72*10^4ms^-1 D +/- 1.21*10^5ms^-1 E +/- 1.54*10^5ms^-1 ANSWER = A 2. Relevant equations Im not sure really, since I dont know how to attempt this question, I think either the debroglie wavelength or uncertainity principle, but to be honest,I dont really know what to use. 3. The attempt at a solution I dont have a clue, would someone be able to at least start me in the right direction, thankyou.