本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
The length of a pencil p cnu+ fibr- 3nbp+h r8 ;ysnhf-99-ur is measured using part of a metre 1hy7 y8s8cpaddi/.z9wjqy -krule that is graduated in millimetres, as shown belo qy 89as7yi wd 8.pyh/c1z-jdkw.  What is the length of the pencil?
A. $(6.00 \pm 0.10) \; cm$
B. $(6 \pm 0.1) \; cm$
C. $(6 \pm 0.05) \; cm$
D. $(6.00 \pm 0.05) \; cm$
参考答案: A
本题详细解析:
With a millimetre scale we can take each reading to ±0.5mm, fo4p9: hbr7p rn8t d2ubqllowing the rule that the uncertainty is half the smallest division. So when we subtract our two readings to get the length of the pencil, we have to adhbdqrb7n8rpu: 4p2t 9d the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.
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Post time 2024-8-21 21:38:19