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

[单选题]
A car has a mass of 1000kg. A mouse has a m(bc,w v-9ibvzp6sgi6x 1 yd n(,mz-ar ass o8ig;,i:x,i * bebfexq f 10g. What is the order of magnitude of the ratio between the mass of the car to that of the mous8x:g *b,iqf;bie ,x iee?

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 gra; n23k mi ,mb 9dq:iz/kfkbj(sms first, by multiplying by 1000 . The ratio ifiq sn,k/m;zbj2 ki:3 m9( dbks 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 .