1. The problem statement, all variables and given/known data The x coordinate of an electron is measured with an uncertainty of 0.200 mm. What is v_x, the x component of the electron's velocity, if the minimum percentage uncertainty in a simultaneous measurement of v_x is 1.00 %? Use the following expression for the uncertainty principle: (Delta x * Delta p_x )> or = h/2pi, where Delta x is the uncertainty in the x coordinate of a particle, Delta p_x is the particle's uncertainty in the x component of momentum, and where h is Planck's constant. My attempt: delta p_x = h/(2pi*delta x) delta p_x=m* delta v_x ?? i dnt know if i am allowed to do this.. also if it is allowed i dont know what to do next..