>> . . 10 .

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 , .

2

d . ρ = 900 /3.

. d .

V ≈ d3N,

V , N .

(2.2.7)

3

.

. ρ = 1,93 104/3 , = 0,197 / .

, :

 

 

@Mail.ru