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

[单选题]
A car has a mass of 1000kg.+cri4u(i ed lfw)2 tz/td c3f) A mouse has a mass of 10g. What is th rtejn(h,l576z fai :ee order of magnitude of the ratio between the mass of jl:fi7r(tze 6 e,ahn5 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 convertedo4fp48p3idj hfc:r+i; p pds0 to grams first, by multiplying by 1000 . The ratio is the mdj0i+hcrd43 p;f4:i psp fop8 ass 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 .