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 i8qucu-lqs7/jbx)5u measured using part of a metre rule that is okg ln 6)q-y ur*lyta-,;q(ip9ba39hpln zn, graduated in millimeypnklg( yolq b, ;n6n9irz)a pq9h --,*3tlautres, 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 edk . yj7fnqm 4k,csiq+i tj.--ve 5eg4ach 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 length of the pencil, we have to add the absolute uncertainties, giving 0.10cm. The length must be presented to eqm4+- iei4q 5gjk7yvcjstfd.-n.k ,the same number of decimal places as the uncertainty.