[填空题]
Hurricanes can involve j47b pfs*q0d -h 1wnvqwinds in excess of 1205e.t 5vv)5zfox sjf:zs*bfm4 $km/h$ at the outer edge. Make a crude estimate of (a) the energy, $ \times10^{16 }$ J (b) the angular momentum, of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 $kg \cdot m^2$) of radius 100 km and height 4.0 km. $ \times10^{20 }$ $kg \cdot m^2$