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 dr7xhq ve p46b;wbz i) i):uwp,istance four times. The ew8ho js-f*kg6 vx n-mbd, /d(readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate vkohb,e(* sfm-d- 6/ 8jxgdwnof 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 cmeqd4mad;e ,17i01imvo r w2dk and 38.2 cm) are both 0.2 cm away from the mean. So C is the 2id1i;k , v14me0 eqdao drmw7correct answer.
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Post time 2024-8-21 21:38:19