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 -y4 gp2r2m1ex wu/ gk,hyxw:ojz0e/bmany powers of ten is the heik q 6-8j*ds,wtnafwl cyq3w 63ght of a human larger than the height of a grain l j-c63 qasw3qkw,y8w tfd6*nof 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 a /izgqo y7.g2a6i,h 3 dmcz7gqbout a 1-3 millimetre long while human 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!