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 z*upyaoo dn0o *xl w59 m;b2+x usi 4 d9 tbm w.o3x4umuv0cl xj-l2ng part of a metre rule that is graduated in mil j 2l4mwuox.l3094x-t cmuvbdlimetres, 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, foll ggb+*lr ;vae8owing 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 thv+; abrg*gel8e uncertainty.
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Post time 2024-8-21 21:38:19