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 t;v4qqmdsk;y p+a+ .qi .mpug; imes. The 9pyntoif-,2i /n6j;*w y y aspreadings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of th6 ti oawy/y;pnfyi2n 9,ps*-jis 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 .+x l5h wqxpsg()tqk2 cm and 38.2 cm) are both 0.2 cm away from the me5g+k.hslwx() txq pq2an. So C is the correct answer.
| 
Post time 2024-8-21 21:38:19