(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The position and momentum of a 1KeV electron are simultaneously determined. If its position is located to within 1Angstrom (Δx), what is the PERCENTAGE of uncertainty in its momentum?

2. Relevant equations

ΔxΔp >= h(bar)/2

3. The attempt at a solution

Δx = 1A = 1x10^-10m

Δp>= h(bar)/2Δx

Δp = 1.055x10^-34(kg/m^2)/s

-------------------------

2(1x10^-10m)

= 5.275x10^-25 kgm/s

how do I get the percentage of uncertainty?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Percent uncertainty of momentum

**Physics Forums | Science Articles, Homework Help, Discussion**