ZhiHeng
ZhiHeng
18-08-2016
Mathematics
contestada
Help me with part (a)
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caylus
caylus
18-08-2016
Hello,
ok i have found the anwser on the net.
Diameter of PM2.5=2.5µm=2.5*10^(-6) m =0.000 002 5 m
Area= 4*π*(1.25*10^(-6))^2=1,9950369987356622981533170541178e-11 m²=0.000 000 000 019 950 366 ... m²
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