Chapter 14, Problem 58GP

& EST Comet crash On June 30, 1908, a monstrous comet fragment of mass greater than ${10}^9$ kg is thought to have devastated a ${\text{2000-km}}^{\text{2}}$ area of remote Siberia (this impact was called the Tunguska event). Estimate the terminal speed of such a comet in air of density $\text{0}{\text{.70**\#x00A0;kg/m}}^{\text{3}}$. State all of your assumptions.