1). T = t/N = 2c/2 = 1 с. t = T*N = 1с*8 = 8c.
2). n = 0,5 Гц; t = 6c.
T = 1/n = 1/0,5 = 2c.
T = t/N→ N = t/T = 6/2 = 3.
3). T = t/N = 100c/50 = 2c;
n = 1/T = 1/2c = 0,5 Гц.
DN/dt = - L*N
L=-(dN/dt) /N ~ 0,04/3600 (1/cek) =
1,(1)*10^(-5
) (1/cek) ~1,1 E-05 (1/cek)
***********************
более точный рассчет
N=N0*e^(-L*t)
(N0*e^(-L*0) - N0*e^(-L*t))/(N0*e^(-L*0)) = 4/100
(1 - e^(-L*t))=0,04
L=-ln(1-0,04)/t = -ln(1-0,04)/3600 (1/cek) = 1,13394E-05 (1/cek) ~1,1 E-05 (1/cek)
S=σt/2
<span>σ=2S/t=2*29.5/0.17=340м/с</span>
<h2>c1m1(t-t1)=c2m2(t2-t)
</h2><h2>4200*15(t-10)=500*2(800-t)
</h2><h2>63000t-630000=800000-1000t
</h2><h2>64000t=1430000
</h2><h2>t=22.4С
</h2><h2>Ответ: 22,4С</h2>
Дано
I=2A
L=0,4м
В= 5Тл
F-?
Сила Ампера
F=IBL sin a
sin 90=1
F=2×5×0,4=4 H
Ответ 4Н