Kognity IB Physics A.0 Measurements & Uncertainty (id: d5e685b3b)

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 calculationm x6te bl.gbg )ov/2m0 will give the answer with the most decim.m)t02bl xgbomeg v 6/q3c*1dis 6o xsao*dxi1sq3s 6c l 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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