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

[单选题]
A car has a mass of bc 8 w)dzda7v6e+ sd pkwg)u+ qmf*6d)1000kr3 ht2/rel z;;9 tmthng. A mouse has a mass of 10g. What is the order of magnitude of the ratio between the mass of the9l3 /;tnzemrr;h2h tt 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 multiplying 1d,4 5parxgf dby 1000 . The ratio is the mass of the car divided by the mass odrg 4f,1px 5adf the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .