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Kognity IB Physics A.0 Measurements & Uncertainty (id: c96f664d5)

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admin 发表于 2024-9-4 22:23:27 | 显示全部楼层 |阅读模式
本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty,类别为 IB物理学

[单选题]
The masses and weights of different lobmmu 4z*wttr. -) 1dobjects arew)gx5 9zzss 0tat2e /m independently measured. The graph is a plot of weight versus mass that includes error bar ztw5 axg2s9 0)mtzs/es.

What do these experimental results suggest?

A. The weight of an object is inversely proportional to its mass.
B. The measurements show a significant random error but small systematic error.
C. The measurements show a significant systematic error but small random error.
D. There is no correlation between the weights and the masses of the objects.


参考答案:  C


本题详细解析:
We know that the line should, theoreticallvg(-:p1 m/sc lhus-,ceqw cz*y go through (0,0) as mass and weight agmc qe-(:l w *1us s,vc-h/zpcre directly proportional. However it does not, so there is a systematic error. On the other hand the points all sit on a straight line which shows there is no appreciable random error. Hence C is correct.

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