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 length of a pencil 5 c,xh i2th+qs is meas 9 puwb28s yh,wb )n+qre1. iefured using part of a metre rule that is graduated in mill ur.92ie, sqefb8 )y1 whpw n+bimetres, as shown below.  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.cg7h; bdtrg) can take each reading to ±0.5mm, following 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 add the absolute uncertainties, gitc 7ggdh;. rb)ving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.
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