German physicist werner heisenberg related the uncertainty of an object's position ( δ x ) (δx) to the uncertainty in its velocity ( δ v ) (δv) δ x ≥ h 4 π m δ v δx≥h4πmδv where h h is planck's constant and m m is the mass of the object. the mass of an electron is 9.11 × 10 − 31 kg. 9.11×10−31 kg. what is the uncertainty in the position of an electron moving at 6.00 × 10 6 m/s 6.00×106 m/s with an uncertainty of δ v = 0.01 × 10 6 m/s ?