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 pencihz * .vqdfahdrn*zkk h((/ -ukv 1p7t(l isjxijr/6hb( -gva /n ,7yrne)r measured using part of a metre rule that is graduated in millimetres, as sh xnrrbr ,-aij6h jyg(/ev)n/7own 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 canikd ozi; qr3k: thl3.- take each reading to ±0.5mm, following the rule that the uncertainty is half the smallest division. So when we subtract our two readings to get the leng:-kqdk ohl3i i; r.tz3th 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.