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 measured usi3*emqsyojj5z3 yl y73ng part of a met,upgrdde+ .f 4k+pa v6re rule that is graduated in millr4u.fa edgkd++pv6p, imetres, 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.mg9qqn9gt..)ccbze 5ji0 y:i 5mm, following the rule that the uncertainty is half the smallest division. So when we subtract our two readin:q9g.0cijez bc ) gnm59 .iqytgs 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.