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 sjudb)0zen47l zy4+dimes. The ,e c8;tht+xv8w3b s gvreadings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 3 vht8;x+svb te8wc ,gcm. What is the best 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 3k(zmng idi0x 5*-kr c*8.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm 0*ir5z gx(mkd c*ni-kaway from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19