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

[单选题]
A car has a mass of 1000kg p8mi 0agv9yn:gh mn(5. A m bq7b )ph 4( 6;cksmlcnj9pjq-ouse has a mass of 10g. What is the order of magnitude of the ratio between the mass of the car to t)q7p;4bp9 q n-jskb lj(hm cc6hat 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 g *5bvryev1n 87p/qln frams first, by multiplying by 1000 . The1 fe8 *y7b5qnrvn l/pv ratio is the mass 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 .