At What Speed (M/s)must a 3

Multiple Choice

At what speed (m/s) must a 3.0-mg object be moving in order to have a de Broglie wavelength of 5.4 × 10^-29 m?

A) 1.6 × 10^-28 m/s
B) 3.9 × 10^-4 m/s
C) 2.0 × 10¹² m/s
D) 4.1 m/s
E) 6.3 m/s