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 measureda j0om/ump, (s using part of a metre rule that is5m.7i reyxb0h7g hrv/ graduated in millimetres, as show/r ve7 mh5 g.ixhr7b0yn 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 cadox)xq*jw 6 w5cg1 a;pl3vibpsr +8;yn take each reading 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 8c;vxwdq;*ixlp+5 y3w )bjapg6 sr1othe absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.