The Speed of an Electron Whose De Broglie Wavelength Is $\times$

Multiple Choice

The speed of an electron whose de Broglie wavelength is 0.0010 m is approximately

A) 7.3 $\times$ 10^-7 m/s
B) 7.3 $\times$ 10^-4 m/s
C) 0.73 m/s
D) 0.51 km/s
E) 5.1 $\times$ 10⁵ m/s