In hydrogen atom, the electron makes `6.6 xx 10^(15)` revolutions per second around the nucleus in an orbit of radius `0.5 xx 10^(-10)m`. It is equivalent to a current nearly

Explanation

Making use of the result obtained in the previous example, distance OC of the mass center form the center is `OC=(2rsin(pi/4))/((3pi)/4)=(4sqrt(2)r)/(3pi)` Coordinates of the mass center `(x_c, y_c)` are `((4r)/(3pi), (4r)/(3pi))`