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 dis6. nwd -co:)szdy2hrv. *paapi2 j zz/.izc6wtance four times. The readings are 37.8 cm, 37.9 eew2;gz;ehsvo5e/2 (m o/y kicm, 38.1 cm, 38.2 cm. What is the best estimate of thiz ims;(okeoyw2hege/ / 5e ;2vs 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. T-m rejlkbs9,ry plri6 -)uzgko (8rg3:9bd y 0he extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C yg(ubs6bd9zjo ),i0prk l- r3 :l9kgryem -r8is the correct answer.
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Post time 2024-8-21 21:38:19