What is the de-Broglie wavelength of (a) a bullet of mass 0.040kg travelling at the speed of `1.0kms^(-1)`. (b) a ball of mass 0.060 kg moving at a speed of `1.0ms^(-1)` and (c) a dust particle of mass `1.0xx10^(-9) kg` drifting with a speed of `2.2 ms^(-1)`? `h=6.63xx10^(-34)Js`.