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 measured using part of a metre rule tha qn9 x(a d,dd6xq9k59em z7vjh t is graduated in millimetres, as shown bel 9j9 z7ek mvhq5ow.  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.(i1:i u:*c1ostoc/oxjid 0e kx5lb ;t5mm, 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 n 1 (/u1x;jt siokcetd loxiobi:c5* :0umber of decimal places as the uncertainty.
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Post time 2024-8-21 21:38:19