Kognity IB Physics A.0 Measurements & Uncertainty (id: 420102d71)

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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 penc0 u s1k.vcy29lpg;;rhha i;o fil9nsw 5nfh;hul 25qzhuu l2s 03 is measured using part of a metre rule that is graduated h3sw92luh2 0unz ;lf5hn5su qin millimetres, 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 can take each ntdn: n0dgj8h8ac*j0h: :oeereading 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 uncg*jjnd::0: heoc08ah tn 8nedertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.