P. 4346. A hundred years ago in 1911 Rutherford wrote in his article, that the speed of an particle, which is moving towards the centre of a gold atom, decreases to zero at that distance, measured from the centre of the gold atom, where its electric potential energy is equal to its initial kinetic energy. The electric potential energy is partly due to the positive charge at the centre of the atom, and partly due to the negative charge which is uniformly distributed in the atom. The radius of the gold nucleus is 10-10 m.
What is this particular distance, if the speed of the particle is 2.107 m/s?
Deadline expired on 10 May 2011.