Kognity IB Physics A.0 Measurements & Uncertainty (id: 420102d71)

admin

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 using:te q p k7v49i xwl5j //jqcak;z2m)jp part of a metre rule that ij*wz955 e j wwhjzd0e1s graduated in millimetres, as showjdjj1ezh9www z5* 5e0n 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 wurq,i a73 .hzye can 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 length of the pencil, we have to addyq3rua .z,hi7 the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.