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If the uncertainty in velocity of a moving object is $ 1.0 \times 10^{-6}\: ms^{-1}$ and the uncertainty in its position is 58 m, the mass of this object is approximately equal to that of : $ (h=6.626 \times 10^{-34}js)$

$\begin {array} {1 1} (1)\;Helium & \quad (2)\;Deuterium \\ (3)\;Lithium & \quad (4)\;Electron \end {array}$

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(4) Electron
answered Nov 7, 2013 by pady_1

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