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

[单选题]
A car has a mass of 1000kg. A mou a9( fs3qo2hcfnx5p o5se has a mass of 10g. What is thew cqg4pd003h nh6 j0rq order of magnitude of the ratio bjrh306nwg 0dq hc0 p4qetween 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, by multiplying by 1000 . Txss6 39jzi-3 :hptdt hhe ratio is the mass of the car dhs-xt id33 st h6z9jp:ivided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .