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

admin

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 : o(hw1 4hys dse1a;ug 8ahpq-1000kg. A m,feb,l3)t:n(sah2 rze i h:mcouse has a mass of 10g. What is the order of magnitude of the ratio between the mass of the 2 ,etzl),3 c ihsar(h:fm:e bncar 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 multipl( m()if .isrta ;jlz2pu(ege+j )2zpmying by 1000 . The ratio i +fa u)lpm2ep.)(zsj z(jitgmi( 2e; rs 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 .