本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
A car has a mass of 1000kg. A mouse has a mass of 10gio*1grdp;t:g houhqk-h9 tkqsj:; / n +/uz7w . What ipo8ck9 qbcui* f0+)xas the order of magnitude of the ratio between the )c*xioacqb uf8+0 p9k mass of the car to that of the mouse?
A. -5
B. 5
C. $10^{-5}$
D. 100000
参考答案: B
本题详细解析:
The mass of the car must be converted to grams first, by mul -g0o7hsy4p pdxg :fa-tiplying by 1000 . The ratio is the m o:a4 y70gppg-xdf -shass of the car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .
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Post time 2024-8-21 21:17:15