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 penci7ad dj1), e5zibah 6.kosvzp*l i1mn4o/,tr*dt mjj. br s measured using part of a metre rule that is graduated in millimetres jm/4d. tr1*,bnjmrto , 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 theh 7yq(5 ol.wxxutrw3j0ql uwn sd9/6* 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 uncertaintieww5 l7d*hx x.u r90yw3 quqos (6tljn/s, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.