[填空题]
Two students are asked 3 tancj z7 b y54byi lj)1eqw5u(3/wlkto find the height of 4yyu4;z gs:t.j vgn;r 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. On.:; u vnysy ;jg4r4tgze student 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
