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

[单选题]
A car has a mass of 1000kg. A mousene8 u2.f(b0e6m-md wak8 mdg r has a mass of 10g. What is the o- hr(u g;rbj0ed)y:kn rder of magnitude of the ratio between the mass of the c d h0 -j:ru;()bgnkreyar 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, j co3ft7zwh *(x0tem f 5j1:dtby multiplying by 1000 . The ratio is the mass of the car divided by the mass of tjhw 01dtef t*fzo53 xm:t(7jche mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .