3. An electron (m = 9.1 × 10⁻³¹ kg) has a speed of 0.90c. What is the difference between its relativistic momentum and its non-relativistic momentum (in kg·m/s)?
(A) 4.3 × 10⁻²²
(B) 3.2 × 10⁻²²
(C) 5.4 × 10⁻²²
(D) 6.5 × 10⁻²²
(E) 2.5 × 10⁻²²

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