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 penciu9fcf) 2b/botx o vo22w.asz2l is measur+kf6a5)qys 9hht q 3wded using part of a metre rule that is graduated in mill3d+sh5khq9 yq t 6afw)imetres, 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 take each reading to ±0.5mm, f g jwj,sat y/ui1v91 9mcb.wz;57k wokollowing 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 absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertai,1jws7g.ya m 9c/51 wuk;jbowvtzk i9nty.