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An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1350 m/s when it enters a cylindrical tube of radius 0.700 cm centered on the x-axis. Inside the tube is a uniform electric field of 4.00 10-4 N/C pointing in the negative y-direction. How far does the particle travel before hitting the tube wall? Neglect any gravitational forces. Note: m? = 6.64 10-27 kg; q? = 2e.

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