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 jc 3 6bibq ku-p957w uennh 201popc8tusing part of a metrek;k) gj .skn ,(wydz4 zr(u8oh alyt46 rule that is graduated in millimetres, a h.z6(o,a kly4 8z;dwknsy(r 4 tgu)jks 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 gxl rev0/9x veo4*mbur qi,n/s+g4o 5we 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 uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places asigge5 ,rl4o/4orxmnu0 x9b/ *svveq+ the uncertainty.

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