[填空题]
Hurricanes can involve winds in e75ba;m kwlhio4y6f o5.p6aj+e6 chg hv8nq 9uxcess ofu lo9fxp 4rs8z) +)-vgn c,v.q+xbev a 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 }$ $kg \cdot m^2$