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

[单选题]
A car has a mass of 1000kg. A6;5p*u oh parf7 *eerz mouse has a mass. li:f+qqne*n of 10g. What is the order of magnitu :ni +fqn.l*eqde of the ratio between the mass 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 b 8jwfq4;r8clee converted to grams first, by multiplying by 1000 . The ratio is the mass of the car divided by the mass ;j4lf8ercw8q of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .