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 u c+yir81xp (n jatmr eq436(fz sing part of a metre rule 2zt9n0l q9rx5c odmr491egaw that is graduated in millimetres, as show ma5 9rocrn21 wlzdtqgx 4e099n 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 ca4z2km;ezwl r1n take each reading to ±0.5mm, following the rule that the uncertainty is half the we2 zzk1rl4;msmallest 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 uncertainty.
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Post time 2024-8-21 21:38:19