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 1000e9h; )dqpr- xa;r kc5vibw;u 0kg. A mouse has a m;k)d7qh h(1 fxp8jb2vlw 4 brzfng/.pass of 10g. What is the order of magnitude h 12lr/fxb pph ;)8 4(zqgjbd7fkw.nvof the ratio between 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 be converted to grams first,s;h 7. lrrlhq1y5p) qp by multiplying by 1000 . The ratio is the mass of the car divided by the mass of .s)yr;lh5qq 1hpp7 rlthe 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