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 time3 ypf6ty5 0re wi*ilmfun/8j/s. The readings arm4 0- r2srv;vbjnl zl1e 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of 1z -v;mbl2nr v4lsrj0this 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 ext.jv, tzda8n, 7 oxnavso: 44htremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C ozdt,to48xn 4 ,j 7vv:naah.s is the correct answer.
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Post time 2024-8-21 21:38:19