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 penc:wm + /rw; rvpw27jotyue im7.il is measured usinaswss(b45rs4: v 5hq ng part of a metre rule that is graduated in millimetres, as showav w5qr4ns 4h5 s:bss(n 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 e1z+75ml o5 kv5z6*lkxnzi sguach 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 add the absolute uncertainties, giving 0.10cm. The length must be presented to the same number of decim7gkl51*x umz6i kzzl 5+5onsval places as the uncertainty.