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 times. The readings are 3j4,;lw9ubq j8mb b,d8bea8pk 7.8 cm,nr5i5,kk / x3 j 3lcqwhrtku63 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate 3jcnthr 5lu,k5 6 wixrk3/k3qof 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 38.0b.s 125g:k3w6hk )9xlvzqjj;l ns shl cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the llv :3nljs1xh 5 6g.29jh;kz)sskqwbcorrect answer.
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Post time 2024-8-21 21:38:19