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;c)b.hcr pnj y2.+my h2fyzu7 ,0rdju four times:vno7*w.o6)*d9z a tih,m hpf vvn 9uu. The readings are 37.8 cm, 37.9 cm, 38.1v :ziod*wu,un67m)vnvoaf 9 p hh9t*. cm, 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 ex/zsf1jek/dm3uhvw9 ,/fflz6v/d z2 ttremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correctze vd1k sfd/zl69tv/fmfj3 z2u/h ,/w answer.
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Post time 2024-8-21 21:38:19