What will be the uncertainty in velocity of an electrons when the uncertainty in its positions is 1000 Å ?

Question

What will be the uncertainty in velocity of an electrons when the uncertainty in its positions is 1000 Å ?, 5 .79 × 10 2 ms − 1, 5 .79 × 10 8 ms − 1, 5 .79 × 10 4 ms − 1, 5 .79 × 10 − 10 ms − 1

MARKS App · Accepted Answer

Δ x . m Δ v = h 4 π 1000 Å = 1000 × 1 0 - 10 m or 1 0 - 7 m Δ v = 6.626 × 1 0 - 34 J s 4 × 3.14 × 9 × 1 0 - 31 k g × 1 0 - 7 m 5 .79 × 10 2 ms − 1

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