The measurement of the electron position is associated with an uncertainty in momentum, which is equal to 1 $ \times $ 10$-$18 g cm s$-$1. The uncertainty in electron velocity is (mass of an electron is 9 $ \times $ 10$-$28 g)
1 $ \times $ 105 cm s$-$1
1 $ \times $ 1011 cm s$-$1
1 $ \times $ 109 cm s$-$1
1 $ \times $ 106 cm s$-$1
Solution
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