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 penc oqxnx8t18 n36xr yaf)na*b 1i,f 2o ps)x6ngfil is measured using part of a metre rule that is graduated nngis)x,1 *fop ab2f6 in millimetres, as 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 t7n22vv .dzdk : baf0zeru wh:d-h2xo9ake each reading to ±0.5mm, following the rule that the uncertainty is half the smallest division. So when we subtract o7ddn:xu:h 2z -d2k0b h wz92a vfv.reour 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.