Question

What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton

Answer 1

delta x = .05 * 10^-9 m
m = mass of electron
delta p = mass of electron * delta v

delta x * delta p = hbar/2

delta x * m * delta v = h bar/2

delta v = hbar/(delta x * 2 * m electron)