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 distanc8o5gvhqzt we hn) z.:,fk9(oseyu juqlfm2z(7 jwmh 21z-zm 2+ four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the be 2jwuzhz mzm- u(fy7q +22l1jmst 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 3ik);3u krw0qa,r / iai 7ial4q8.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is i/arr u7 0q l;)aaq4ii3w,ikkthe correct answer.
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Post time 2024-8-21 21:38:19