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 tim5n*xyt5x 9eprks+ 2 9eqa :hkges. The readings are 37.8 cm, 37.9 6k5t )nxje+3gp.sbad 8ez9 mycm, 38.1 cm, 38.2 cm. What is the best estimate of this measuremen5.xesj mbg zy93p6 nk)ea+d8 tt?
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. bld)iynslyeo7hz: 4w 3h9v4wx a+) w3The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct )en:vw4y) zh4il aoxl9h +b3s7dwwy3 answer.
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Post time 2024-8-21 21:38:19