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 pencn/0pc *2* rn9dltxwgzlru 5x);pz, y zwd;:fril is measured using part of a metre rule that is graduated in millimetres, as shown belozfw;; ryz,p:d w.

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, f ptju )mgq*2dduq s2x+7p8g:kollowing 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 uncerq:8s mpuxqggt2pk)*+ duj7d2tainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.