talk:me5463:hw_13

$K = sigma sqrt{pi a_{eff}} sqrt{sec{{pi a_{eff}}/{W}}}$ = $20810^6 = sigma_c sqrt{pi a_{eff}} sqrt{sec{{pi a_{eff}}/{W}}}$

$a_{eff} = a + r_y = a+ Delta p = a+{1/{2 pi}}({K_{eff}}/{sigma_0})^2$

$K_{eff} = lambda a_{eff} sigma sqrt{pi a_{eff}}$