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 using part of a metr,x+c5fjh ko(b tb8 ss/ 48vanre rule qbp3cdjpnz::tnz ,o (jvz;hg ;.3/k qthat is graduated in millimetr .,kzzbg3:v3qq( ;:djntp; /jzoh n pces, 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 reading to ±0.5mm, follozr6 zk-/ccc mdu; 93jswing 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 uncerta6kr 9sc 3c-c;mudzz/jinties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.