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.n0l 5(, crhls.b8k fo5govy8j8 cbn,:mp ae;8 .x rukh+xm, 37.9 cm, 38.1 cm, 38.2 cm bxm+paer,x.:n8; khu. 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 cxv1tw0o a,1pc2 2f j,t qm6xxcm and 38.2 cm) are bo 1a2fcpoxx 0,6wvm, qjttxc1 2th 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