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 w *+ ugsfu+3xd fuo-*vk7erg0 distancf f84qlxr4un2c)oa -2gkcs 2 ue four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. 2c8 cu 4q rl )-fafus2no2xg4kWhat 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 (37.8 cm and 38.2 cm) arsq r;km9okg8t-lq /6 ne both 0.2 cm away from the mean. So Cmq;86/r9q ksno- k tgl is the correct answer.
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Post time 2024-8-21 21:38:19