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Q. At the point of fission, a nucleus of 235U that has 92 protons is divided into two smaller spheres, each of which has 46 protons and a radius of 5.90 multiplied by 10-15 m. What is the magnitude of the repulsive force pushing these two spheres apart?

Q. A uniform diving board, 12m long and 20 kg mass is placed on a platform. How far can a 60kg person walk down the board from the edge of the platform without the board tipping over?

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