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 usinu.mrr4 e)cc1gg part of a m*vmsox yohb+ chg.n43 ( w2w2cetre rule that is graduated innc(hyowg3o4b.2 vw +cmh2*sx millimetres, 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 tak wgtb(7zmh:nsq3*0ca:qd g. 5 zv1f jv pk*my;e each reading to ±0.5mm, following the rule that the gbqd(:g.vaswh37f1*0mcj5 ; :zmyvt*kq pznuncertainty 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 same number of decimal places as the uncertainty.