本题目来源于试卷: Physics Bowl by Topic 1: Unit, Prefix, Significant Figures, Estimation & History，类别为 美国物理杯赛(Physics Bowl)
[单选题]
14.18: A rectangular block of woo7f,tiksz(l+m gi5:q hd has;sn 3al)kw:s bkh9/sn a mass of 17.8 gram and dimensions of length: 3.00 cm, width: 4.00 cm, and h/wbslh;) skkn9:3n saeight: 2.00 cm. Which one of the following choices correctly gives the average density of the block?
A. $7.42 \times 10^{5} \; kg/m^3$
B. $7.42 \times 10^{2} \; kg/m^3$
C. $7.42 \; kg/m^3$
D. $7.42 \times 10^{-1} \; kg/m^3$
E. $7.42 \times 10^{-4} \; kg/m^3$
参考答案: B
本题详细解析:
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