Answer 1

Mass of the bullet, m = 0.040 kg

Speed of the bullet, v = 1.0 km/s = 1000 m/s

Planck’s constant, h = 6.6 × 10⁻³⁴ Js

De Broglie wavelength of the bullet is given by the relation:

`lambda = h/mv`

`= (6.6 xx 10^(-34))/(0.040 xx 1000) = 1.65 xx 10^(-35) m`