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

[单选题]
A car has a mass of 1000kg7sq+t0h:h 9/xs mqrsb. A mouse has a mass of 10g. What is the order of ma8- 2pohuh(eh.pc /q+a cu.f fb 0zbj/wgnitude of the ratio between the mass of the o j fuh/fbcc. (zw ap-eh.0upqh/8b+2 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 b0ci , 9q.vhajvy 1000 . The ratio is the qva0iv9 c.j, hmass 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 .