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 mou e ld;q7o,hj,hse has a mass of 1hp-ynw3 l:/b m0g. What is the order of magnitude of the ratio between the mass of the c-n y/wml:pbh 3ar 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 fi d9luqe/q+ o)drst, by multiplying by 1000 . The ratio is the mass of the car di)udlo /de+q9qvided 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