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

[单选题]
A car has a mass of 1000kg. A 444n6 ,mrhrbk1 cvugzmouse has a mass of 10g. What is the order of magn,rg 6mkuv4r1 4z4bhnc d(0y 0-8hp 16njfak f bfz1jyxitude of the ratio between the masfk6j0y hpxbz-j daf(801 n1fys 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 be converted to 9ggg 4n mp.z9rgrams first, by multiplying by 1000 . The ratio is the mass of the car divided by the 9gz9.gmn4gr p mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .