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 d1, rc5)j8b3gzy7( aaruzzwzdistance four times. The readings an 5c+to2:g0 al j) vz5q3amad2 hcfon4re 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimatec l:go32qct 40h5avn5n+ma)ja o2f zd 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. The extremes (37.8 cm and 38.2 cpyi-,tcb5,)x ee k g)zrrf+/zm) are both r-,xt)/fep) kb y c,5g +eizzr0.2 cm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19