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 fopa /lj 0mx2x -ic(arr0w*fl7aur times. The readings a 4fb t*+npnm 4;wzneur00b0pmre 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of m0 znw 4un;bef0pt4b*+rp0m nthis 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 386ti5 9w mug5gkqc/kgmud5 05z.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 ck9uz06m d5iwcu g5 m 5/t5ggqkm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19