1) The uncertainty in position and velocity, of a particle, are 10-10m and 5.27 x 10-24 ms-1 respectively. Calculate the mass of the particle is (h =[ 6.625 x 10-34 Js) A) 0.099kg B) 0.99kg C) 0.92kg D) None Answer: Option AExplanation:According to Heisenberg's uncertainty principle, $Δx.mΔv = \frac{h}{4\pi}$ or $m= \frac{h}{4\piΔx.Δv}$ = $\frac{6.625\times 10^{-34}Js}{4\times3.143\times 10^{-10}m\times5.27\times 10^{-24}m/s}$ = 0.099 kg (J =kgm2s2)
