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 pencil is measured; jjl u22ggphormjb kny 96.ijk*ip9 q4af* 4, use vu*.hysv 9vslvjb* 4dr,0o;ing part of a metre rule that is graduated in millimetres, as show;0o*h9bvsyu*,ev4rvdv l.j sn 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, following the ru)nm4 4i ahgl( 0 ac73dssdh;9kvw/ezwle 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,(s)hvl9w40hs; ez4dm ngic/ wdak a37 giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.