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In a television tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.0 105 N/C during the first 5.0 cm of the tube's length; then they move at essentially constant velocity another 45 cm before hitting the screen. (a) Find the speed of the electrons when they hit the screen.

  • Physics -

    KE= Eq*distance

    KE= 1/2 mv^2, and v= sqrt 2KE/m

    solve for KE, then v.

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