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 is6t27m;4mirmcp 5ybk y*r xx dzay50;q measured using part of a metre rule ps f66,f4a+hzi-gle:;y ldc bthat is graduated in millimegci 6 4af6:b,sllpzhyf e+-d;tres, 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 5ds7-ip 1stce we can take each reading to ±0.5mm, following the rule that the uncertainty is half the smallest division. So when we subtract our e1i 7s5pc td-stwo 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 of decimal places as the uncertainty.