A=q(s2-s1)
q=24 мН/м=24*10^(-3) Н/м
S1=S
20см^2=0.002 м^2
S2=S-0.002
A=24*10^(-3)*()S-0.002-S)=-0.0000048
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A=q(s2-s1)
q=24 мН/м=24*10^(-3) Н/м
S1=S
20см^2=0.002 м^2
S2=S-0.002
A=24*10^(-3)*()S-0.002-S)=-0.0000048