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 meas8pdi 6 tok(ep 3zy0xr1ured using pard* ;3: x-t cii5haj0w*tuoinmzu5+ mf t of a metre rule that is graduated in millimetres, as sth;ami di*c+i5x0*o j n5t -3um:w uzfhown 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, z6;-xfka(u zlhkfg4( hq )eta 8z1-cefollowing the rule that the uncertainty is half the smallest division. So when we subtract our two readings to get the length of the pencil, -f zu-4 ate(6ck(haeqkl ;1zfz )h8 gxwe have to 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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