A lincar particle accelerator as shown above can accelerate electrons to very high energies thanks to very strong electric fields with field strengths up to 100 MV/m Find the length d that the linear accelerator must have in order to be able to accelerate an electron from zero starting velocity at the negative plate up to a speed equal to 3.0 * 107 m/s (10% of the light speed) as it hits the positive plate. [Hint: use energy conservation]