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 avmuh ) o id;/3h-lmj* cn,g9cj dis6a:y7i+bz- ts 6zwiv ktance four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this m7zivw6i+- yst6kzb:aeasurement?
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)2q/8- tenkr-wef po( 9gpl dc cm) are both 0.2 cm away from the mean. So C is the pcl9wg pe--oqk2)t/e8fr nd (correct answer.
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Post time 2024-8-21 21:38:19