Question: An alpha particle (charge +2 e ) moves through a potential difference V = -0.130 kV. Its initial kinetic energy is 4.30 10 16 J.

  1. An alpha particle (charge +2e) moves through a potential difference V= -0.130 kV. Its initial kinetic energy is 4.30 1016J. What is its final kinetic energy?
  2. A shark is able to detect the presence of electric fields as small as 1.20 V/m. To get an idea of the magnitude of this field, suppose you have a parallel plate capacitor connected to a 2.20-V battery. How far apart must the parallel plates be to have an electric field of 1.20 V/m between the plates?

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