Question

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) 78 m/s

b) 0.78 m/s

c) 0.078 m/s

d) 7.8 m/s

e) 0.0078 m/s

please explain.

Answer 1

Using the heinsberg uncertainty principle So, using the formula, Av 6.625 10A-34/2*6.1*10A-25*0.7*10A-9 Љу-078 m/s Thus, answer) option B)0.78 m/s