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 measure ,r h+kth21ydaa 3p mbj..*n db (ahq*ad using part j3o8harg c*iv(5 sng:of a metre rule that is graduated in millimetres, as shown below. 58go3 c*rs( :ngi jahv 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 the rkrh a.*1i3wku 0w u3srule that the uncertainty is half the smallest division. So when we subtract our two readings to get the length of the pencil, we have trau0 uskri hw33w1*k.o add the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.
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Post time 2024-8-21 21:38:19