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 penciko ;lyhob78sg*r (kcn) j *f l6ksd0b0l is measured using part of a metre rule that is graduatt.r5 f nyk9a1hb 9k0mved in millimetres, as shown belfa9hk bn rm9.51yv t0kow.

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 ±0.5;s:n, +zm deir+w3 jxrmm, 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 plaxrn ;zm jesd+r,+ i3:wces as the uncertainty.