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 *kcv lbk)(4 be1s tdk*v* b askjqgzznd b09(b/8+nt/30g. What is the order of magnitude of the ratio between the mass of the car to that of t* s9b/qknk3nj *0 dbbtgadz+ t/8v s(zhe 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 conveb6 i(ijw2c *torted to grams first, by multiplying by 1000 . The ratio is the massijbto2 wi*( 6c 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 .