>> 10 .

9. -

 


58. -

, , , . , , , - .

, .

1. ρ = 0,9 /2. 1 = 8 104 2 = 1,1 105 . ?

. 0 ( ) , , . . = 0. , - (9.6)

2. ρO 2 105 , 106 (/)2.

. n . , ρ = mOn, mO .

3. , , . . , ?

. . , υ1, , υ2 (N1 = N2),

4. , , , = 0,1 ? = 1,108 /, ρ = 10,5 /3.

. Δt Δl, Δl/Δt. ΔV = SΔl, S - . :

m , Δt, m0 , N . , .

, υ, , :

ƒτ = m0Δυ = m0(0 - υ) = -m0υ.

ƒτ = +m0υ. Δt N , , N , FΔt = Nυm0.

= F/S,

= Nυm0/SΔt.                     (1)

(1),

m0 = A/NA, NA = 6,02 1023 -1. (2),

1. 7 27 . ?

2. , n = 3 1025 -3, m0 = 5 10-26 ?

3. 1,2 3 1022 . ? 105 .

4. , m = 6 , V = 4,9 3 = 200 .

 

 

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