Kognity IB Physics A.0 Measurements & Uncertainty (id: a7f97d4b5)

[单选题]
A car has a mass of 1000kg. Ab5ll0g(z0od (jef .gm mouse has a mass of 10g.xg*4v8tz so39l2ewb ,c ce* hg What is the order of magnitude of the ratio betwc ezg3to* 2cveg4lh8xs 9, bw*een 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 first, by8y, q b0ix)hbgij92b a multiplying by 1000 . The ratio is the mass of the car divided by the mass of the mouse: xib0 hjag)b,yq2i 8b9$$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .