[填空题]
Two students are asked tufc/r1b4s . ,6cyi36 kvlnygvh2;n nyo find a0-k7oeub+vw r8hz l+:tx a-zthe height of a particular building 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 student reports a fall time of 2.0 s, and the other, 2.3 s. How much difference does the 0e vhoz+0aw8 - t-+a:b7lk xzur.3 s make for the estimates of the building’s height? m
