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. hiwumh753z) j What isqk0pp y- 1hu7m flm;, 6c:sfve the order of magnitude of the ratio between the mass of the car to thfq f6 :1cme, p -7yshv;mklup0at 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,gwwa54q onug;0 .gwmz; pz 9c, by multiplying by 1000 . The zg 9pw cawom;g0z,4qn;wu. 5gratio is the mass 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 .