[填空题]
Two students are asked to fin+fr u2mo) f; 2gt-doxad the height of a particular buildiwd .y9 1q* hcrtes39bsa5quq 5ng using a barometer. Instead of using the barometer as an altitude-measuring device, they take it to the roof of the building and drop it off, timing its fall. One stub.ssutd r1h*55ya39eq9wq cq dent reports a fall time of 2.0 s, and the other, 2.3 s. How much difference does the 0.3 s make for the estimates of the building’s height? m
