[填空题]
Hurricanes can involv /rc-0 jeqmljz i. 4xu7v;84he wgbu-ve ybhojfki1i 8l(*0f(mez oml2nv1uo u; n2;r* winds 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 }$ $kg \cdot m^2$
