[填空题]
Hurricanes can invol w0mr: g1 q8:xy w:nl3h vpl-s-i7lm: unnuj)fve wdsuqzr bc0e u cvf678,yf t1(:nym68minds in excess of 120 $km/h$ 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 }$ $kg \cdot m^2$