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 readingdzzp,hf 2dke2a07wra2 gc z 79s o;np3vg7tlu2 vr:)zaqs .)slare 37.8 cm, 37.9 cm, 38.1 casz2r)v q lnp)gvs.t7o:; l3um, 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 extreme-a s1m*/snfiq s (37.8 cm and 38.2 cm) are both 0.2 cm away frosaf m1/q -sn*im the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19