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

[单选题]
A car has a mass of u ;1mq lwv0zza59bw8d 1000( oji/f((i;dnleazx 3 kg. A mouse has a mass of 10g. What is the order of magnitude of the ratio between the mass of the car to that of t3df e(j(;ioi z/ xaln(he 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 grami gs owvt24w77s first, by multiplying by 1000 . The ratio is 2 vwwo ig74t7sthe 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 .