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 vlegh; tmkm9)tfq3f+).1x pi of a metre rule that is grabdn)b54az62ntox kt 5 q6kr(m9 3 jdyaduated in millimetres, a5 qn2bxa4)3k6j(ot6yd bkzdtrmn9 5as 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 rep+odl 5v9e p7; vjfet:ading 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 add the absolute uncep9t pv 5 ed+e7l;voj:frtainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.