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

[单选题]
A car has a mass of 1000kg. A mouseld )m*7 css.ut has a mass of 1kl-dmov f7, ucdh,ww4rrxxp j3 c:.;;0g. What is the order of magnitude of the ratio between 3 -pw,rcdu:,vmxo.7;4fljhrxd ;c kwthe 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 mhzqu6fhxk ))nf9q5 :fultiplying by 1000 . The ratio is the mass of the car divided by the mass of the mhzqf qfu:h )x)f96k 5nouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .