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 tk,34 g r4pgafdistance foacm bwg3xfw4-ppnbg+b5 t:(4ur times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is tpa4nw3 (b+m:gc- 4gp5bbtf wx he 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 measurkk2iu6n7rq kmt:0:1mv ljv* wements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away rn 2k 0lw* ui7tv6mk:v1mq:kjfrom the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19