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 readinfbqw: v0rolx85m 2so) gs are 37.8 cm, 37.9 cmw3fdtdq: ih0 uz-44f b, 38.1 cm, 38.2 cm. What is the best estimate of this measurewf uqdzt-dih43f04 : bment?
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.:e xj7t mqa765lcttp 38.2 cm) are both 0.2 cm7 e5pt q7.j6a xtmc:lt away from the mean. So C is the correct answer.
| 
Post time 2024-8-21 21:38:19