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 measurjv:pu e5 :( 97bmo,i0xy/kt t-x ewbjqed using part of a .3up2hey03)i 8hvdf ysa;ecvmetre rule that is graduated in millimetres, as shown ;pv8)uhiyd e2 c3y 0sfevh.a3below.

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, followin y5,k1w 8fyeorg the rule that the uncertainty is half the smallest division. So when we subtract our two rea85f oy1e y,wkrdings 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.