本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
A student measures a distance four times. The readings are 37.8 cm, :)j uo)o:ph2gd lq8 ug37.9 cm, b0n+ro x ci :bxlz /sr7g:ej3.38.1 cm, 38.2 cm. What is the best estimate ofx z+ b/rosg:jx i7r.nbe30c :l this measurement?
A. $37.8 \pm 0.2 \; cm$
B. $37.8 \pm 0.4 \; cm$
C. $38.0 \pm 0.2 \; cm$
D. $38.2 \pm 0.4 \; cm$
参考答案: C
本题详细解析:
The mean of the measurements is 38.0 cm. The extremes (37.8 cm xl z.g;-6s2glwk0c knand 38.2 cm) are both 0.2 cm away from the mean. So C is the correc.c lkz6gx 20nwkg sl;-t answer.
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Post time 2024-8-21 21:38:19