[填空题]
A space vehicle returning-ns9sdwcbdg16h:u5( vq 0 bl j frop,iu 3cs, 6,w qvfbvb8o0-tjnm the Moon enters Earth’s atmosphere at a speed of about 40,000 km/h Molecules (assume nitrogen) striking the nose of thnc,06bq8bspjw ,-f3uv iovt ,e vehicle with this speed correspond to what temperature? (Because of this high temperature, the nose of a space vehicle must be made of special materials; indeed, part of it does vaporize, and this is seen as a bright blaze upon reentry.) K