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In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.51 106 m/s.

(a) Find the force acting on the electron as it revolves in a circular orbit of radius 5.28 10-11 m.

magnitude ___ N

direction _____

(b) Find the centripetal acceleration of the electron.

magnitude ___ m/s2

direction ___

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