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 zpzs: vec q*x;et7 h*o) 07evt5i zj6dfour times. The vr*1v3u(t2wk ady/ sf readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this mev(tdw/f*2u 3vs 1yarkasurement?
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 id*yr oa,l-1 k6h:bfjr s 38.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct ar ,j1 *ab-:dkl yrf6ohnswer.
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Post time 2024-8-21 21:38:19