Question: need help with this physics question. Please answer quickly. Question 7 (1 point) Listen If the rest energy of an electron is 0.511 MeV, what

need help with this physics question. Please answer quickly.

Question 7 (1 point) Listen If the rest energy of an electron is 0.511 MeV, what is the speed of the electron when accelerated by an electric field, from rest, through a potential difference fo 20.0 kV? O0.480c O0.272c O0.392c O 0.349c O0.206cQuestion 5 (1 point) Listen Find the binding energy per nucleon of 62 Ni if the neutral atomic mass of it is 61.928345 u, mass of hydrogen atom is 1.007825 u, and the mass of a neutron is 1.008665 u. 7.234 Mev per nucleon 8.795 MeV per nucleon O 24.26 MeV per nucleon 20.51Mev per nucleon 6.287 MeV per nucleon

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