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

[单选题]
A car has a mass of 1000kg. A mouqwt6t+vzxk+ fu9 2fl1c i:7hz sj8 4rra(42updr(*m t x:lklqze has a mass of 10g. What is the order of magnitude of the ratio between the mass of the car4dr:2ulrjkr x*( pzl atm8(q4 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 w6k1qa- / iomvfirst, by multiplying by 1000 . The ratio is the massmiw1 vkao6q/ - of 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 .