An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1000 m/s when it enters a cylindrical tube of radius 0.600 cm centered on the x-axis. Inside the tube is a uniform electric field of 3.00 x 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_alpha = 6.64 x 10^-27 kg; q_alpha = 2e.