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

[单选题]
A car has a mass of 1000kgst ohn:6/hr,6-qbzm r t1+fad . A mouse has a mass of 10gnlmw q*y9,ias(pk/g 0 . What is the order of magnitude of the ,9 qsl/pmk(n0aygwi* ratio 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 mul4tkf;8 do9wv otiplying by 1000 . The ratio is the m8kdtoo4;fwv 9 ass 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 .