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 1f 4+fgvbqrr:wkb+0z yg(*n p,0g. What is6ivis+b*j .b u the order of magnitude of the ratio between the mass of the car to that of the svb* .i6jb+iu 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 copk :t8otp:8en6b bc ,nnverted to grams first, by multiplying by 1000 . The ratio is the mass of the car divided by the mass o8:n pcbp:6kebt,o8tn f the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .