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 pence/2z5gcfgkg0js4 / 6vy-)zx i- d yiabv 8rch*4 ws0zoil is measured using part of a metre rule that is graduated in millim8 z cvhw0r*o4setres, 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, fohwi 2ipq5:u3p .r hs)xllowing 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. T :)pru5qs.2xihi3wh phe length must be presented to the same number of decimal places as the uncertainty.