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.hu4 bd4b)lb *8twkda, What is the orderqs**dv q;1 )xqq8 zran of magnitude of the ratio between the mass 1)s;q *vqn r*a8qqxz dof 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 multiplying by:*s4-ezinrm 3 z5aohr 1000 . The ratio is the mass of the car o :sze3zi*m- a5 rrhn4divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .