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

[单选题]
A car has a mass of 1000kg. A mouse has a mass of d1+h1)x cjmml10g. What*b h9ypwwx.y0 is the order of magnitude of the ratio p b* .9yhy0wwxbetween 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 9(f ;3 ezilntbc0 7caqto grams first, by multiplying by 1000 . The ratio is the mass ofq7i f ccb(9z3tae0;ln the car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .