Kognity IB Physics A.0 Measurements & Uncertainty (id: 5755219dc)

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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]
If A=10.0 and B=0.50, cbc+yp0 hh15bnl6q 6q7- v dplwhich calculation will give the answer with the mosh :m9qbtrt2. y)n2tezt decimal places?y2b:nm9t .ht r)eq t2z

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.