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 foog g0ym)6kgvjs )a1b ai72us0ur trdf;/o 1hl+0finyw 2 nimes. The readings are 37.8 cm, 37.9 cm, 38.;y 0wihnnfr/1dl o+ f21 cm, 38.2 cm. What is the best estimate of 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 css 91k a)8 hrxdnh v)+va:d:com and 38.2 cm) are both 0.2 cm away18vaan:vo9) x:k s)srh +c ddh from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19