[填空题]
Pelicans tuck their 1;4tb slzr 4pxwings a7l g0cgarln -,nd free fall straight down when diving for fish. Suppose a pelican starts its dive from a height of 16.0 m and cannot change its path once committed. If it takes a fish 0.20 s to perform evasive action, at what minimum height must it spot the pelican to escape? Assume the 0g-7glarnl ,c fish is at the surface of the water. m