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 measured using part of a metre rule that is ez:dh9 ilfzzpc.a7:3 *mlhimnmqv 85*yvlu 8:;cb9ugraduated in m*i8qlb*muyn9m 8u5 cl:hv ;v millimetres, 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 ru ,,ap am8iie8zy-c75jdv 7vzeading to ±0.5mm, 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 8zciz-87 ,, amdeayvvu p5ji7of decimal places as the uncertainty.