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 mqv s:x,pm6; ahouse has a mass of 10 pyi,ka-/uczx0-8ql ng. What is the order of magnitude of the ratio between 8q0nxa yiu/ l,pc-z-k the mass 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 )4w izvqd/on 9sj(fo5be converted to grams first, by multiplying by 1000 . Thei) oq(o4 jwn/f svz95d ratio 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 .
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Post time 2024-8-21 21:17:15