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

[单选题]
A car has a mass of 10d(yx bwb 169ws00kg. Ae9 5pso((h.g 1oh6k gbyl)egb mouse has a mass of 10g. What is the order of magnitusg9(kpe g b)leg56yhhoob .( 1de of 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 mt1n6 ho fwa2wb n0;r)be converted to grams first, by multiplying by 1000 . The ratio is the mass of o2frww60;m)n ahn bt1 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 .