2013 2014
, 20 2 3 0 27 .
: | : |
p o= 1 . S = 20 2 d = 3 M = 29 / R = 0,0821 T1 = 273 K T2 = 300 K | poV = m 1 RT 1/ M; poV = m 2 RT 2/ M Δ m = (p o SdM / R)(1/ T 1 - 1/ T 2) (1 × 60 × 29 / 0,0821) × (1 / 273 − 1 / 300) = 6,9 V = Sd, T 1 = t 1 +273 = 273 T 2 = t 2 +273 = 300 Δ m = 6,9 . |
: Δ m -? | : 6,9 . |
, , 2,5 3,5 8 .
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U1=3,5 U2= 8 | = U 1 + U 1 / R 1 * r = U 2 + U 2 / R 2 * r = U 2 + U 2 /2,5 R 1 * r U1+U1/R1*r = U1+U1/2,5R1*r r*(U1/R1- U2/2,5R1) = U2-U1 r*(2,5U1-U2)/2,5R1 = U2-U1 r = 2,5R1(U2-U1)/ 2,5U1-U2 = U1+2,5R1(U2-U1)U1/2,5U1-U2 = 1,5U1U2/2,5U1-U2 = 56 B |
: -? | : 56 B. |
" ".
, 310-3, 0,5 *10-33, 500 /?
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m = 3*10-3 v = 500 /2 V=0,5*10-3 3 | P=1/3*p*v2 p=m/V=3/0,5=6 /m3 P=6*250000/3=5*105 |
: P -? | : 5*105 . |
, B B = 1,2 . 5,3 . . , . m = 1,671027 .
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Ek = 5,3 B = 1,2 m = 1,671027 c = 3108 / q . = 1,6021019 α = 900 = sin α = 1 | v = √2 Ek / m = 3,2*107/ F = q υ B sin α a = F /m = qvB/m = qB/m√2Ek/m = 3,7*1012 / 2 a = qvB/m = v2/R = 2,8*102 / |
: a -? | : 2,8*102 /. |
" ".
- 600. 900. .
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α = sin600 γ = sin900 | sin60+sin90+ β =180 180-150 = 300 β =300 n = sin α /sin β =sin60/sin30 n=0,87/0,5=1,74 |
: n -? | : 1,74. |
. 500 , - 4,0 . , 10 80.
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t 1 = 10 C 0 t 2 = 80 C 0 m 1 = 0,5 V = 4 p = 1000 /3 c1=(H 2 O) = 4200/*0 2 = (Al) = 920 /* | Q=Q1+Q2 Q1 = c1m1(t2-t1) Q2 = c2V(t2-t1) Q1 = 4200*0,5*(80-10) = 147 Q2 = 920*4*(80-10) = 257,6 Q = 147+257,6 = 404,6 |
: Q -? | : 404,6 . |
" ".
100 /, - 60 /.
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v1 = 100 / v2 = 60 / | t1 = S/2/100 t2 = S/2/60 v . = S/(S/2/100)+(S/2/60) = 1/(1/2*100)+(1/2*60) = 1/60+100/2*100*60 = 2*100*60/60+100 = 75 |
: v. = | : 75 /. |
54 / . . , , 0,03.
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v = 54 / = 15 / v0 = 0 = 0,03 | F = mg a = -0,3 / 2 S = v02/2a = 341 t = (v-v0)*(-a) = 15*0,3 = 50 c |
:a -?, S -?, t -? | : a = -0,3 /2, S = 341 , t = 50 |
200 , 0,4 . ? .
: | : |
m = 200 = 0,2 E = 0,4 g = 9,8 /2 | E = En = mgh = 0,4 h = n / m * g h = 0,4/200*9,8 = 1,96 |
: h -? | : 1,96 . |
, (λ = 760 ) (λ = 380 ) .
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λ1 = 760 = 7,6*10-7 λ2 = 380 = 3,8*10-7 h = 6,626*10-34 c = 3*108 / | E = h*v = h*c/ λ E1 = 6,626*10-34*3*108/ 7,6*10-7 = 2,62*10-19 E2 = 6,626*10-34*3*108/ 3,8*10-7= 5,23*10-19 |
: E -? | : E 1 = 2,62*10-19 ; E 2 = 5,23*10-19 . |
10 , 15 /, 25 . ?
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m1=10 u1 = 15 / m2 = 25 u2 = 0 | m1u1+m2u2 = u'(m1+m2) |=>u2 = 0|=>p2 = m2u2 = 0|=>m1u1 = u'(m1+m2) u' = m1u1/m1+m2 u' = 10*15/10+25=150/35= 4,3 |
: u'=? | : 4,3 /. |
, 0,510-10 .
: | : |
k = 9*109 e = 1,6*10-19 r = 0,5*10-10 | F = ke2/r2 9 × 109 × (1,6 × 10−19)2 / (0,5 × 10−10)2 = 9,2 × 10−8 |
: F -? | : 9,2*10-8 H |
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137N 105B b-. 137N?
: | : |
10 5 B 4 2 He | 10 5 B+42He=147N=137N+10n (); 13 7 N=136C+0+1e+00Ve ( ) |
: 137N -? | : 13 7 N+10n; 13 6 C+0+1e+00Ve. |