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 measured1/+7 qpayea2 g1swiyn using part of a metre rule pawc-6o7p (z/bogfn0 that is graduated in millimet0ap/po7 (-g6 wn obfczres, 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 caib . xyved o5*8wfcnyk42d*e; n take each reading to ±0.5mm, following the rule that the uncertainty is half the smallest division. So when we subtract our two revy*wiky; f*do.e 2 c8 n4x5debadings 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.