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 dista0zewxl a n09v2nce four klj 3o55 q;zev (ftl1otimes. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this measuremel t5 3;vk5zqoe(jlof 1nt?
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. Thep7i w eb/9/fwmh 86gtys3lb)w extremes (37.8 cm and 38.2 cm) are both 3witw7eb8fl p)9gh mw/b6/sy 0.2 cm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19