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 distan-h+ apsso1ab,lcj8h/-(v b3 zo 9slhfc q9ghebu5,. ghri8n v--ery )x z)xm)fe four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm8xim5hzn). 9bvr -g)ehu)f,qy rgex- . 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 38.0 cm. The extremes (37.8 cm and 38.2w j )* b0lmpb0r4m(yfc cm) are both 0.2 cm away from the mean. So C is r0m* )wfy40bc(lmb jpthe correct answer.
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Post time 2024-8-21 21:38:19