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

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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 mou0;*fg1r-(m g ovo malhse has a mass of 10g. Wha:m+tqz9fv g ()awqw :0o ihzl8t is the order of magnitude of the ratio between the mawmvzq:fgi)htwl0 z q +:a8o(9ss 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 be converted to grams first, by+.z u.eg-uv,i uis8ux03ombxx) l9u q multiplying by 1000 . The uu0xg i+us9.zlu)q.em3x -xu ,io bv8ratio 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 .