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The uncertainty in the position of an electron is 1.0 × 10⁻¹⁰ m. What is the minimum uncertainty in its velocity? (h = 6.626 × 10⁻³⁴ J s, mₑ = 9.1 × 10⁻³¹ kg)

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2.9 × 10⁵ m s⁻¹ 1.45 × 10⁵ m s⁻¹ 5.8 × 10⁵ m s⁻¹ Correct 7.3 × 10⁵ m s⁻¹

Δv ≥ h/(4π m Δx) ≈ 5.8×10⁵ m s⁻¹.

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