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An Alpha Particle (A Helium Nucleus,having Charge +2e and Mass

Question 62

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An alpha particle (a helium nucleus,having charge +2e and mass 6.64 × 10-27 kg) moves head-on at a fixed gold nucleus (having charge +79e) .If the distance of closest approach is 2.0 × 10-10 m,what was the speed of the alpha particle when it was very far away from the gold? (k = 1/4πε0 An alpha particle (a helium nucleus,having charge +2e and mass 6.64 × 10<sup>-27</sup> kg) moves head-on at a fixed gold nucleus (having charge +79e) .If the distance of closest approach is 2.0 × 10<sup>-10</sup> m,what was the speed of the alpha particle when it was very far away from the gold? (k = 1/4πε<sub>0</sub> , A) 2.3 × 10<sup>5</sup> m/s B) 4.6 × 10<sup>5</sup> m/s C) 2.3 × 10<sup>6</sup> m/s D) 4.6 × 10<sup>6</sup> m/s
, An alpha particle (a helium nucleus,having charge +2e and mass 6.64 × 10<sup>-27</sup> kg) moves head-on at a fixed gold nucleus (having charge +79e) .If the distance of closest approach is 2.0 × 10<sup>-10</sup> m,what was the speed of the alpha particle when it was very far away from the gold? (k = 1/4πε<sub>0</sub> , A) 2.3 × 10<sup>5</sup> m/s B) 4.6 × 10<sup>5</sup> m/s C) 2.3 × 10<sup>6</sup> m/s D) 4.6 × 10<sup>6</sup> m/s


A) 2.3 × 105 m/s
B) 4.6 × 105 m/s
C) 2.3 × 106 m/s
D) 4.6 × 106 m/s

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