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 penc4klsk.75v+ zf+f vmyail c 2ld,x5p;r3mb8 wlt bis measured using part of a metre rule that is graduated in millimetres, l p;, 2tb53cdxmrbl8 was 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 reading to ±0.5mm, following thr d, y2-fs17nfa zr0(sle9sefe rule that the uncertainty is half fey-2(frdrsf n9ae sz1s7l0,the smallest division. So when we subtract our two 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.

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