An 80 kg meteor of pure iron ($c = 448 \frac{J}{kg \cdot ^\circ C}$) initially at -100$^\circ$C travels 50 km through the stratosphere before it breaks up (assume this happens when the meteor reaches its melting point). If the melting point of iron is 1534$^\circ$C, is traveling straight down to towards the ground, and initially moving at 990 m/s, what is the speed of the meteor when it breaks up?