A Molecule of Roughly Spherical Shape Has a Mass of 6.10

Multiple Choice

A molecule of roughly spherical shape has a mass of 6.10 × 10^-25 kg and a diameter of 0.70 nm.The uncertainty in the measured position of the molecule is equal to the molecular diameter.What is the minimum uncertainty in the speed of this molecule? (h = 6.626 × 10^-34 J ∙ s)

A) 0.78 m/s
B) 7.8 m/s
C) 78 m/s
D) 0.078 m/s
E) 0.0078 m/s