Uncertainty Principle Using Momentum and Position: Suppose that the speed of an electron traveling 2.0 km/s is known to an accuracy of 1 part in 105 (i.e., within 0.0010%). What is the least possible uncertainty within which we can determine the position of this electron? (melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A. 2.0 mm
B. 5.8 mm
C. 14 mm
D. 14 cm
E. 8.5 nm
Answer: B
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