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 metre47kpofd ( is,k rum 2;lvx w*lpo vvv(65zle that is graduated in ml*2v5v (vx;v pml z6owillimetres, 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, following th)5wrrisv iwzj8r1.z v0cr2 /3fp xv3q e 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 prese.p1r/zri3v2 0cw5 3rzvrw) js 8qvixfnted to the same number of decimal places as the uncertainty.