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 times. The readings are bhrq2g) sd peyk q,)9(37ycr-s gh0y,p. x/ w2kw,xi elbxyg6/:.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. Wha0syxy2:/gw,,w . -krxh yl / bpegi6cxt is the 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 measurements is 38.0 cm. The extremes (37. ) ponb)n6epr-8 cm and 38.2 cm) are both 0.2 cm away from the me) enpo-6p)bn ran. So C is the correct answer.
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Post time 2024-8-21 21:38:19