本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
A car has a mass of 1000km (7st7cac+ajbka 4p3/a z-t tg. A mouse has a mass of 10g. Whcgdkl 62(pp*vvll 2ymx n4.-pat is the order of magnitude of the ratio between the maskl l2pgp(46nvm *2. yxl-dcpvs of the car to that 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 b) i ;.-w msr2)cu4aynt(rli rbe converted to grams first, by multiplying by 1000 . The ratio is the mass of th lu)cnr)4iisa wm2rt(;-br y.e car divided by the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .
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Post time 2024-8-21 21:17:15