[填空题]
Hurricanes can involve winds n1 tcby/tho5c8/4 h.- divbyuin excess of lr:7nynswlq9:: 7 peo+q6 4zkxilp gz dq2i,6120 $km/h$ 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 }$ $kg \cdot m^2$
