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 fousf* 9 4m xc3qpq29qeusr times7i2wn 3q6 b)fu xo9oft. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this me6ibofqt)fx27 nu w o93asurement?
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 38.0nqud*t04d.c :w(g s wpqcbt:6 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the cor :qn:tc (*wt0ug4b q6pwsd.cdrect answer.
| 
Post time 2024-8-21 21:38:19