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 10g. Wha0 bn wugod,mn37 ve-:cz6lxfoxpl-ed) /c1 w+edr;l. t is the order of magnitude ozw-+r l)./do1xfe ld6 xe;plcf the ratio between 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 (vde0 0vo co3f. The ratio is the mass of the0odv0c(f3 v eo car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .