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 using part of u9e d 7dt)17dw ip.0 byg 1btsnnoj rax)w351va metm9n gp jh5)debm .b -o5e7qf.jre rule that is graduated in millimetres, as shown below.eq7 pfgmd.h)b9.jn 5mej-o5 b

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 ;jgpg9(k 3ltdeach reading to ±0.5mm, following the rule t (3dgptl ;9kgjhat 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. The length must be presented to the same number of decimal places as the uncertainty.

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