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 10g. What zm-i;tx*i)e5 fg .e3h dj5opjis the order oft/hjv0e2uz , c magnitude of the ratiot zcu je02,/vh 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 be converted to grams first, by multiplying by 1000 .i kz(co0spxtxl+:1b, The ratio is the mass p: x xsib1tz,k(0clo+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 .