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

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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 (;ty(r/cf7d ol7j nrk1000kg. A mouse h:fty)oz.lx ptv /;bl 67p 2sawkvfe8-as a mass of 10g. What is the order of magnitude of the ratio betwv7 )a;t:bf/2l pv -z68 xlpwto.y eskfeen 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, by multiplying by 1000 . Tfr *u t:rpi;/o5x snc1he ratio is the mass of the car divided by the masspsu15or ;xn:cti /rf* of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .