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 1000kg. A mouse has a mass of 10g. What is th v.:bfsb)y*hrxg),) pnrxr:cp 3)exqe order of9. ucf( )oi 4enrgfro* magnitude of the ratio between the masgnor ).irf uo 49c(*efs 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 hofof0 4cl/ gt8 by)1 pveu11bf+ixe2 be converted to grams first, by multiplying by 1000 . The ratio is the mass of the car divi pb 1hu0)f1cyft82b exe1 og4+o livf/ded 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