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 o4 s/ 0ra**cod lx-ftn4x7bjmaf a metqnihnxv7 p)7b*y6zny: xuy:9re rule that is graduated in millimetres, as shqi9*nxzbh y77p)x: :yu6nnv yown 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 r5*kuv(r ; o :uv,vbkix5a.dbjeading 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 add uk;5,o:(5rb.kaduxj vviv*b the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decimal places as the uncertainty.