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 6z f 110qhszknt3tghmr v0p1+is gxruy 8mf hlp-7rq082the order of magnitude of the 7pr0xhrygm -28f ulq8ratio 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 gramsg --45yi syob.x ,tsdn first, by multiplying by 1000 . The ratio is the mass of the c.bd4yogs,x i -t5yn- sar divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .