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physics ( need answer very very soon pleaseeeee)

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An electron enters the region of a uniform electric field between two oppositely
charged parallel plates as shown, with an initial velocity of 3 x 106 m/s. The
electric field between the plates is measured to be E = 200N/C. The horizontal
length of the plates is 10cm.
a. Find the acceleration of the electron while it is in the electric field.
( and if the electron is negativly charged, but we don't know what type it is)

  • physics ( need answer very very soon pleaseeeee) - ,

    a. Acceleration is
    a = e*E/m

    e is the electron charge and m is the electron mass

    b. Solve the equation

    Since the electron's velocity component parallel to the plates remains the same as when it entered,
    t = 0.10 m/(3*10^6 m/s)

  • physics ( need answer very very soon pleaseeeee) - ,

    how do we find out the electron charge and mass if we don't know what type it is?

  • physics ( need answer very very soon pleaseeeee) - ,

    sorry but that didn't really give me the answer because we don't know the electron mass or type??

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