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 ee8ha8 w03cj +eue 8uv97bpxh is measm xhh+jaggstgt(ny.s5k *v1y*t8 0y q)k/y*dured using part of a metre rule that is graduated i*jgd t1h)0 k yq*m/hy8y s5tgx atn*v.s(yk+gn 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 take each rs,yqfg/- *(opf:fa n xeading 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 (-/ofyfapfsq x*g,:n 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.