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)u*/p/z mxikq meastuf,;v4p1lo eaf8 kx1 ured using part of a metre rule that is graduated in millimetres, oek;up,1 x8lf 4f a1tvas 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.v 6p5c7fjxo:v/b-5 mowk4qr1 hse 1k r5mm, 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 c e5rofmq/w p1kxv:41rv 5o7s- 6khjb same number of decimal places as the uncertainty.