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 fo ww/9e0 y6jl dc2ls*jrur+9zci 9f :vcr*p 5mnnq times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this mean p m:qc n*fc5i+r99vzsurement?
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 (8o9z nj xi rhn7e8:(av37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct answer.vonx8r n7e ih8(a9j z:
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Post time 2024-8-21 21:38:19