[单选题]
Suppose that the speedbgo,kt hn/;u1 of an electron travelil 5u7cnk9w.m; vduekh7s5 )dmng 2000 m/s is known to an accuracy of 1 part in7m )uddc7k e595m khuvs;.lnw $10^5$ (i.e., within 0.001%). What is the greatest possible accuracy within which we can determine the position of this electron?
A. $2.9 \; mm$
B. $5.8 \; mm$
C. $8.7 \; mm$
D. $1.2 \; cm$
Post time 2024-1-22 00:52:27