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 meas81wey/ yw kd ;q9)yersured u:wbtyo 4 p,7dw 5i941qe xu b70vhnowysing part of a metre rule that is graduated in millimetres, as shownw p5,yb4wdu1iv w4y7o nt:0xq7e9o bh 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 t ou l lu 6m0g7:h7ne+xuv;eyv:o ±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 abv+ uue 7:ogvhyu:07n 6llx em;solute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.