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 disk9 f(y6sh tbeu(,,fpqk6si6jt r* n;njeuf)6xance four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimxn6 rju f);*enate 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 c;0ny.uatykzux1 1 x( 1zvr4sbm) are both 0.2 cm away from the mean. (yr4xv0ys.k nt 1 bzu;1x1azuSo C is the correct answer.
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Post time 2024-8-21 21:38:19