[填空题]
In a simple model of the hydrogen atom, nmwx3+/.hd) dz;wp1k,bo8m lansz 2k the el1dui kagau(av v+ 5 e2*.x(waaqur4/ fectron revolves in a circular orbit around the proton with a speed g(fu a w/uqa 4+5rkxvv12iaae*(a.ud of $ 1.1\times10^{6 }\，m/s,$. Determine the radius of the electron’s orbit. [Hint: See Chapter 5 on circular motion.] $ \times10^{-10 }\, m$
