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What is the approximate radius r of the 238U nucleus? P= m Incorrect What magnitude of electric force Felectric do two protons on opposite ends of the 238 U nucleus exert on each other? 0.144 N Felectric Incorrect If the electric force were the only force acting on the protons, what would be the magnitude a of their acceleration just as they left the nucleus? 4.30 x1025 a = m/s Incorrect Why do the protons on opposite ends of the 238U nucleus not accelerate apart? The force of the other protons pushes them toward the center of the nucleus They bounce off of the neutrons and return to the center of the nucleus. The strong nuclear force holds them together. The gravitational force of the other nucleons holds Question Source: Freedman College