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An alpha particle is a nucleus of helium. It has twice the charge and four times...

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Physics

An alpha particle is a nucleus of helium. It has twice thecharge and four times the mass of the proton. When they were veryfar away from each other, but headed toward directly each other, aproton and an alpha particle each had an initial speed of4.1×10-3 c, where c is the speed of light. What is theirdistance of closest approach? There are two conserved quantities.Make use of both of them. (c = 3.00 × 10^8 m/s, k = 1/4πε 0 = 8.99× 10^9 N · m2/C2, e = 1.60 × 10^-19 C, m proton = 1.67 x 10^-27kg)

A.) 1.1 x 10^-13 m

B.) 1.6 x 10^-13 m

C.) 1.8 x 10^-13 m

D.) 1.4 x 10^-13 m

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