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

[单选题]
A car has a mass of 1000kg. A mouse i4g8jk6 7oug lxe-* uehas a mass of 1k3 7qpza kr;kn yd6pw+m9ls(t40f nt 00g. What is the order of magnitude of the ratio between tk wmfyt3pqnd097pz;ls t6ka0(n+ r k4 he 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 mus ,cej97pwz5vet be converted to grams first, by multiplying by 1000 . The ratio is the mass of the car divided by the mass of the mo9v5pwc,z e7jeuse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .