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 is measured using pa ugi;md4lpi;b81/v iglex m9.rt of a metre rule that is grad zxao or:vp -)*1w-g.ssc6bzh uated in millimetres, as shown be w1g:*-6r . c a zhbxs-)pzoovslow.  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 readinga7 oq9ewb z2)gi: 9wuq 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 uncertaintiei2 go uqw z9)qb:7we9as, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.
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