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 ij:3- ikg9qwo hx kmk;ko 3z 6ucj/3k8vs/.de x gkiknfxumix- u + 80qe/7ir6.c4o3xgz measured using part of a metre rule that is graduated in mi. ouc/nmeiezix3kg. xqxd0ukgx7/ 64 r+-fi 8 llimetres, 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 ±0.5mm, following the rup.x w *8jd aq03,f l)/qg uv4ufqdeda7le 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. T40flu.8adq*fx,/qq7v wj3ea d upd ) ghe length must be presented to the same number of decimal places as the uncertainty.

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