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

[单选题]
A car has a mass of 1000kg. A mouse has a mass of 10g. What :l7fzph 4ozxrgq+/ gp05: rne ihy+ 6jh yafbp46f/ fu3s the order of magnitude of the ratio between the mass of the c6j+3 yyfpf u/6 hba4fhar 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 behl18r ojtapu/o84y/s converted to grams first, by multiplying by 1000 . The ratio is the mass of the car dividrtuol1 84hyo a /8jsp/ed by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .