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 distanq5wz i4rn9nb/ ce four times. The readings are 37.8 cm, 37.9 cm, 3hg3hxr- 7an(vxn5p v-8.1 cm, 38.2 cm. What is the best es3hr 7vx a-vx5-h( gnpntimate 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 38.0ubd 8.t( ;r ko.zxyv2h cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct ans( rd2.v8 ; zyutbhxko.wer.
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Post time 2024-8-21 21:38:19