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

[单选题]
A car has a mass of 1000kg. A mouse has a mass of 10g. What is the order wbhsu7 ::t ed;ve ;wt7of magbbr, zph wum4 :bs( h6-)hhjf)u+ub3h nitude of the ratio between the mass of the car to that of the +4bb sm3uz (bj)pfh )u:wuhhr hb,h-6 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 . (+zmlyu03k3 r4gjkl1 gbwu+ p The ratio is the mass of the car divided 40 +3mr(jpk3+g zlgbk1 ylwuuby the mass of the mouse: $$ \frac{1000 \times 1000}{10}=100000 $$ As $100000=10^5$, the order of magnitude is 5 .