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 penc; u;lglspya* nmha -2 p:-.nxqil is measured using pa8mmik h/q5fn;rt of a metre rule that is graduated in millimetres, ask; 85ifqhm/m n 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 wx 6nf vz+uo8m1e can take each reading 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 uncertaintnx18m6fzvuo + ies, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.