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2. -
2.7. -- . . . , = 10-3 r /, , r . () . ρ V: m = ρV. 1. . . , . m1 = ρ1V; m2 = ρ2V, ρ1 = = 1000 /3 , ρ2 = 13 600 /m3 . 1 = 18 10-3 /; 2 = 0,2006 /. ,
2,5 , . 2d . ρ = 900 /3. . d . V ≈ d3N, V , N . (2.2.7)
3. . ρ = 1,93 104/3 , = 0,197 / .
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