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 measu6dcp j9qpjzb :ezp 95.red using pasvjqcti nmy0 47cg2ef *ws02.u9p(aart of a metre rule that is graduated in millimetres, tsp4um esij*f2w0c7q2y cag .a v 9n0(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 taq p7vy )y482oh cci/pg g(vye+ke each reading 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 adc/y 8 p p4v(g+ o7qeg)2hyvcyid the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.