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 pencil is m1o s:u qg2j z)wpw3t9jeasured using part of a metre rule th. /*62mqywd(s 84c thnjpv 9ttlzqip .*jpnk 5at is graduated in millimetres,k8 p5cjli tt*w.64qq/s nhpdmp (yztn9 jv2. * 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, following the 8c. dxnuh4gj299cp ekrule that the uncertainty is half the smallest division. So when we subtract our two readingspgxjk 9.d h4 cncue982 to get the length of the pencil, we have to add the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.