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 i(bhtq9 .)j wovn+5um+j-k5r hsb u3 mls measured using part of a metre rule that is graduateus+fndehl877 l.f5l)h ad)mfd in millimetres, as shown below.lf 7)7d. 8na)m5fll +hude hfs

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 eachwh7n -x el+w6qq6 +zn-romg ,o reading to ±0.5mm, following the rule that the uncertainty is half the smallest division. So when we soohg-nm r 6ew- qqn6wlx++z,7ubtract 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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