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 8wbnsz 4tl +kglah((/ times. The readu (eayw+;+f*rtd mo,aings are 37.8 cm, 37.9 cm, 38.1 cm, 38t e;araud, y(m+ +fow*.2 cm. What 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.4ndtq0 (v 1fbwzeb(5 h The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct answer. 40fvnzebb5(d (w t1qh
| 
Post time 2024-8-21 21:38:19