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

[单选题]
A car has a mass of 1000kg. A mouse has a 6yr3g y y)c fc*5sup:et6*htbmass of 10g. What is theu9u fu9zi47i k order of magnitude of the ratio between the mass of theu9u9if u7kiz4 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 td5 jd8q:b 4bmbo grams first, by multiplying by 1000 . The ratio is the mass of the car divided by the mass of the moub 8ddq4jbm b:5se: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .