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 iimcwan-l* bw 23t8c3ml+. jla mass of 10jia:+ yl o ja7y7;asy(g. What is the order of magnitude a(aoy7sj liaj y:+;7yof the ratio between the 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 firstvkav, ng tt+/4, by multiplying by 1000 . The ratio is the mass of the car divided by thev/k4at,tgvn + mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .
| 
Post time 2024-8-21 21:17:15