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 5n; /xn/)b xnyyjrs5dis measured u 7sdxkjwsafje:4nl (la p (.:;sing part of a metre rule that is graduated in millimetres, as sho 4kn w d: s(fjl;7lsa jpa:x.e(wn 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 atf s iiai,31n;o3;eh 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 n fsi,;h o3iaet ;a31ithe absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.
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Post time 2024-8-21 21:38:19