Kognity IB Physics A.0 Measurements & Uncertainty (id: 43662a57a)

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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]
By approximately how many powers on4 ,wj2pnt8tba p;y- jf ten is the h3;1*cfdwli8mg m d v3jt/wxj5eight of a human larger than the heightmvli jf 3w / mxdw8cd*;tjg351 of a grain of sand?

A. -3
B. 2
C. 3
D. 1000


参考答案:  C


本题详细解析:
A grain of sand is about a 1-3 millimetre long while hum 7rchte w.lo+,an beings are about $2 \mathrm{~m}$ tall (very roughly!). So: $\frac{\text { height of human }}{\text { size of a grain of sand }}=\frac{2 \mathrm{~m}}{0.002 \mathrm{~m}} \approx 1000$ So we are about $1000=10^3$ times taller than a grain of sand. If you chose #2, this answer implies that a human is $10^{1000}$ times bigger than a grain of sand. This is a huge number!