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 is m :mgwqb h/s,m,hfal .,3+g(y noeiqej4 zc3h9j6 s2x1 lm *fqfeasured using part of a metre rule that is graduated in millime n fom i1q6*y +g3q9l2fc(xejh4e3jzs tres, 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 reading to ±0.5mm, p7 av k s+ei87k4kmvg(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, giving 0.10cm. a8vpe+77kskmv4k( g iThe 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