Help me with part (a)

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asked Oct 5, 2017 25.6k views

1 Answer

Craig Kelly · Answer 1 · 2017-10-10T17:14:15+0000

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

Help me with part (a)

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