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 pencn aivdi5 1z 4:rfwn03s) *5 se8 j7m,bkl7ghj8 fv*ubhoax+ rvil is measured using part of a metre rule that is graduated in mibmf5+ avhe*juj7k7v 8g )8s xblh r*,ollimetres, 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 t 2yqp i.0;hz1d c4r yrx57uatw 0mj0sxake 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 the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as tu2 wy 5 0rhcj yq04x mr10ixptzas;7.dhe uncertainty.