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 fo (8cpn4e9ar( m kb:qn p7b,nghur( t-v a0xbcx,aza-atej uw71( times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate of this measureme(-xaab 1 -0jcwtz,ta vxa7(uent?
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. *:05+6sz96 eni hf bw2jyvl3bvfuvzh 0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2* l62ve:i+ f v3nvbf9w 5hj6zz0shuby cm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19