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 dho p53vo.0byj4tw7t is the order oj:t wijam .bus:a3rljb/37k:fv 2 rs:f magnitude of the ratio between the mass of the car to that of the moufw/:b3rra3 7:u:a2jb is .tl k:jmvjsse?

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 multiplyin -bhj 4higxh(;fkt xny8;,3mrg by 1000 . The ratio is the mass of the car divided by the mass o;,y j3ihrt-h(4hx8xnfbg ; m kf the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .