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 mousw(ttb kj;du * j3gha;,e has a mass of 10g. Whadktc*fg -9c s,j;m1xet is the order of magnitude of the ratio between the mass of the ca9x gm1dc,; sct f-jk*er 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 axn 73sui,/1( z1c5uy ohgsaymust be converted to grams first, by multiplying by 1000 . The ratio is the mass of the car divided1usi15a ,s7uhnxza /(y c3o gy 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