The x coordinate of an electron is measured with an uncertainty of 0.20 mm . what is vx, the x component of the electron's velocity, if the minimum percentage uncertainty in a simultaneous measurement of vx is 1.0 % ? use the following expression for the uncertainty principle: δxδpx≥h2, where δx is the uncertainty in the x coordinate of a particle, δpx is the particle's uncertainty in the x component of momentum, and h is planck's constant.