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

[单选题]
A car has a mass of 1000get0n,v0 qfs82r ;rrzkg. A mouse has a mass of 10g. Wh-( ehniq v 2g8axo3vf9at is the order of magnitude of the ratio between tf2(vqo3eg9ai x8 -nvhhe 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 ,med(:+ rla0 abxvk 9fconverted to grams first, by multiplying by 1000 . The ratio is the mass of the car divib revfa: 9+x,d(a k0mlded by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .