Given the result of Eq. (10.43), find the relation for the balloon radius given a constant \overline{\nu }_{s}. 4\pi r^{2}\frac{dr}{dt}=\overline{\nu }_{s}\pi a^{2},
Given the result of Eq. (10.43), find the relation for the balloon radius given a constant \overline{\nu }_{s}. 4\pi r^{2}\frac{dr}{dt}=\overline{\nu }_{s}\pi a^{2},