gh- —
At =--, At = 7,9°C
m3(r + cj2) + cwf,(m, + m2) - m2l
tk = - ,
cjm, + m, + m.
(k = 46,5°C
x =
, x = 0,96
11.74. x =
8h
2 gh + v2
11.77. t = 32 min 48 s
cw(f2 O m = 0,145 kg
t =t _ m/ + m3cw(f,oo ~ t2) mtck + m2cw = cJt,oo ~ t,) m,„ r
m,
I
x =
rm - pV{n - 1)
mr
x = 92,6% c
Q = 6,03 • 106 J
mw
c
d
a
a
r] = 0,8
k = 0,05; począwszy od grubości 10 cm spadek strat energii jest bardzo mały
^ = 75
Qs '
QAl
, t = 5 s
kATS
12.1. a) 0 = 10~5 Wb;
b) 0=0;
c) 0= 0,5 • 10~5 Wb
/
/
12.8. £ = ka2; £= 10"3 V; a) 0 = a2(B0 - kt)
BIS
12.9. / = ——, / = 1,46 mA
16tp
12.10. c
12.11. IAB = lDe = 0; lBC = 2^fp'
I/bcI = \Q = 5,2083 mA
12.12. U = Bvl, U = 2,45 • 10“4 V 2atS
W
12.14. £*• sliwuł, £• 10"* sin 5ł V
12.15. /' tp.M ilu rył; /
sm /ot
12.17. /„ = 0,2 A;
02
V2
12.18. d
/sk = ^ A; f= 12,5 s-’
12.20. £AB = -20 V, £co = 20 V, -60 V, £bc = £ol = 0
£ef -
12.22. a
12.23. b
13.1. c
13.2. x =
vn =
0,1 m cos 2y[2t; T = s
V2
0,02 m cos 10 f 0,005 m cos 10 7tt 2 Hz; x0 = 0,2 m;
0,8rt m/s
13.12. k = 5 nr’; T = 4ns; v = 0,1 m/s; x = A cos (0,5f + 5z)
13.13. A, = 0,78 m; A2 = 3,45 m; AA = 2,67 m
13.6. a =
co ~
13.7. x =
— cos0,2t; T= 10ji s; m
13.15.
13.16.
f' = Yr f'= 425 Hz;
0,2 S'1 FT2
f2 = 850 Hz
4jr2m' n2
13.17. b) A, = 4/,; A, = 0,7 m;
. n n m
13.8. v = Acosin-, v = — — 6 5 s
A2 = ^/2; A2 = 0,786 m;
13.9. x =
te- au
13.18.
13.19.
Aśr = 0,743 m; c) v = 323,3 n / = 2A; v = 10 m/s
13.10. x = -=r =
Eq g+m
a) /?, = 7 B = 70 dB;
b) p2 = 4 B = 40 dB
13.20. 1=10-4 W/m2
14.1. c 14.3. C =
1
(2nv) L
~ 0,25 • 10~12F
14.10. y= 180° - 2a= 120°
14.11. p= 180°- (a + 90°) = 80°
14.4.
14.13. v = -, v = 124 913 km/s n
14.5. c
14.6. A = 2ncVIC, A = 2229 m 14.8. I)
( .
0,27
14.14. An = — - —, An = 0,01571
14.17. A = —., A - 0,397-10 6 m nr
14.9.
(
|
(
Li
14.18. sin/? =—sin <7, /i 55°30' U.