Some forms of cancer can be treated using proton therapy in which proton beams a

Question

Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed to collide into a tumor, killing the malignant cells. Suppose a proton accelerator is 6.9 m long and must accelerate protons from rest to a speed of 1.1 X10^7 m/s. Ignore any relativistic effects and determine the magnitude of the average electric field that could accelerate these protons. Incorrect: Your answer is incorrect. N/C I keep on getting 1.59 and it says i am wrong

Explanation / Answer

let the electric field be E N/C so, the potential difference between the plates=Ed applying energy conservation , 1/2 mv^2=eEd or E=8.22*10^4 N/C

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