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

[单选题]
A car has a mass of 100vy7h7 e) *mjvpmo:p.sok* c;a0kg. A mousezdd;*lxe gs/m c5 6x )tnvig:/ has a mass of 10g. What is the order of magnitude of the ratio between the mass of the car to tha :t 5ed xvgnzgms* l/idcx/6;)t 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 fitzkkl.ynrrww 6b6df me./,10 rst, by multiplying by 1000 . The ratio is the masn. mk.fb6e1yzlw k trd /6r,w0s 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 .