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

[单选题]
A car has a mass of 1000kg. A m/ avqe*gagk)- ouse has a mass oj .wel b, v6x;,drnc2jf 10g. What is the order of magnitude of the ratio between the mass of the car to that nlex;,,cr2v j. d6jw bof 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 multiply*g;(btlv;l rxp (0ljaing by 1000 . The ratio is the mass of the car divided by the mass of (;( b g*lalvr j;xl0tpthe mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .