[填空题]
An iron meteorite melts when it enters the Earth’s atzb6,d x ,pb)nfdd b ;*3tfzbg/mosphere. If its 1d *ztq6qb :spinitial temperatursp*1t6:d qzq be was -125$^{\circ} C$ outside of Earth’s atmosphere, calculate the minimum velocity the meteorite must have had before it entered Earth’s atmosphere. m/s