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 measur yp+objsd-f q 42m0 0qbed using part of a metre rule that is graduat d0xs 64 u6) yxhq u/ginja1c7fed in mill 7sa4cujqx1)f6x/ h y n0ug6idimetres, 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, following the ru-bb y9)7c;j( n zodtxale that the uncertainty is half thez)9 jbtoa (dbc;nyx 7- 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 decimal places as the uncertainty.
| 
Post time 2024-8-21 21:38:19