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

[单选题]
A car has a mass of 10 g+x1f /jjdi.f00kg. A moq9v00.l2j0aqkna kik6)g/eaqw 6lfwuse has a mass of 10g. What is the order of magnitude of the ratio between the mass of tgka 6 00wa) a0vql9f qq/.kj2eiwk6nlhe 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 ;g 74 ,pkqo4+ucfgxux converted to grams first, by multiplying by 1000 . The ratio is the mass of tuu7oc 4qxk+,p4f ggx ;he car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .