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 10g9 (,,w4 hpbb zrxu8jia. What is the order of mhomv23;edi(v ux*+ euagnitueouv*i;uvd +3 e2hmx(de of the ratio between 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 b)e p4t:msf )sl 9i9sope converted to grams first, by multiplying by 1000 . The ratio is the mass of tsp spi :)so9l mt4e9)fhe car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .