本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IB物理学
[单选题]
If A=10.0 and B=0.50, which calculation )2u gsxs l)fg5will give la6 n9un) kc f tfrazun-(q8+-the answer with the most decimatfnnar96alu)k ( z-n+-uqf c8l places?
A. $A \times B$
B. $A/B$
C. $A^2$
D. $B^2$
参考答案: D
本题详细解析:
$A$ is given to 3 significant figures and $B$ is given to 2 significant figures. Hence all calculations using $B$ will have answers with 2 significant figures.
Calculations with just $A$ will have 3 significant figures Therefore, $A \times B=5.0, \frac{A}{B}=20$, $A^2=100$ and $B^2=0.25$,
so with 2 decimal places, D is the correct choice.
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