the speed of an electron in orbit about the nucleus of a hydrogen is 2.2x10^6 m/s. it takes 1.5x10^-16 s for the electron to complete one orbit. calculate the radius of the orbit
[2.2 x 10^6] x [1.5 x 10^-16] =3.3 x 10^-10 meters - circumference of the orbit.
[3.3 x 10^-10] / 3.141592 =1.05 x 10^-10 meters - diameter of the orbit.
[1.05 x 10^-10] / 2 =5.25 x 10^-11 meters - the radius of the orbit.
