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

[单选题]
A car has a mass of 1000k j::drp o; 8ham2j-nheg. A rd7qh 74:9g nih npj1a 9rc)2w8 tsnigmouse has a mass of 10g. What is the order of magnitude of the ratio between the mass of the car to that of the mousehw:7rdgp 7iqg8 ni4n9 nh2rc19tj)a s ?

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, byo/drent( 3+ aa multiplying by 1000 . The ratio is the matan3o +/ead(r ss 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 .