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Help me with part (a)

Help me with part (a)
asked 25.6k views
4 votes
Help me with part (a)

Help me with part (a)-example-1
asked
User Myaut
by
8.2k points

1 Answer

6 votes
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


answered
User Craig Kelly
by
8.5k points
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