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 distase: bj9-x cj1pnce four times. The readings are 37.8 cml2w o4eqyel*(, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this measurement(w4lel *o2 qye?
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 extremes (37.8 cm and 38.2 ijz;3igh ud-b( h x7 qv/e)a7+ paqie+cm) are both 0.2 cm away from the mean.q ui/qi z7gid e3p-+x;+eab()v7jhah So C is the correct answer.
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Post time 2024-8-21 21:38:19