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 isj 95k :0yd;zoi5blrpa jw/e ;c mea+f9q q-dhrdc5 a**s b3kit7pasured using part of a metre rule that is graduated in millimetres, asfaq q*dchp937r* i -dab k+5ts 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 ±0.5mm3+3vysn(v n(3 g0axsgp 2tcd h, following the rule that the uncertainty is half the smallest division. So whn+3g3tc30yg x v(svd(2san hp en 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.