What is the de Broglie wavelength of
a. a bullet of mass 0.040 kg travelling at the speed of 1.0 km/s,
b. a ball of mass 0.060 kg moving at a speed of 1.0 m/s, and
c. a dust particle of mass `1.0xx10^(-9)` kg drifting with a speed of 2.2 m/s ?

Explanation

`m=0.04kg, v=1xx10^(3)ms^(-1)`
a. `lambda=(h)/(mv)=(6.6xx10^(-34))/(0.04xx10^(3))=1.65xx10^(-35)m`
b. `lambda=(h)/(mv)=(6.6xx10^(-34))/(0.06xx1)=1.1xx10^(-32)m`
c. `lambda=(h)/(mv)=(6.6xx10^(-34))/(1xx10^(-9)xx2.2)=3xx10^(-23)m `