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

[单选题]
A car has a mass of 1000kg. A mouse has a masx7uz4 cmc c+u (sh1pev:8)xxzs of 10g. What is the orderso45jko+ 1 cfy7an)mov8chy ) of magnitude of the ratio between the mass of th87 a4nohc5yv) myk1 jo)so fc+e 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 1 8)id+:vwjrdx ohko g11k,8wn 000 . The ratio is the mass of the car divided1xov8dn kk ,1:j)hd igrw8o+w by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .