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

[单选题]
A car has a mass of 1000kg. A mouse has a mad96cxj; ,orpl:i0tj 1mdz xx.0k bxq;ss of 10g. Wharxa sv-k04m 2vt is the order of magnitude of the ratio betwmxv2s0ak -4 rveen 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 be converted to grams first, by mulu dibw)oj ;(7i2gd hw5tiplying by 1000 . The ra (;2)objhgiu wd5i dw7tio 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 .