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

[单选题]
A car has a mass of 1000kg. A mouse has a ma;kf z, liy, rrogl.9x3ss of 10g. What isz xsx5)crr2v)db 8ea0 the order of magnitude of the ratio between the mass of the car to that of trv2)d)cex80 z raxs5bhe 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 tmdshje.qa4 y -c(-*wujxu )y2 pl11be o grams first, by multiplying by 1000 . The ratio is the mass of the car divided by the mp(yq)j4*a-h-.d u 2xbuwys1e1me ljcass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .