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

[单选题]
A car has a mass of c .jsoj 3,q06 x4so8flmi*wxi1000kg. A mouse has a mass of 10g. What is the8 3-ogf0d doezedi :ty7/ot ;g order of magnitude of the ratio between the mass of the car to that of the mouz ot:3 /oe0g-7dg fodied8;y tse?

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 k q*3oo39x aoj6h;dr gmust be converted to grams first, by multiplying by 1000 . The ratio is the mass of the car divided by th6o9orjg3 3d ;h qx*oake mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .