Vx=4+0,5t
t=10 секунд
Vx=4+0,5*10=4+5=9 (м/с)
Q=m*L;
A=(кпд/100%)*Q=(кпд/100%)*m*L;
А=P*t=P*S/v;
(кпд/100%)*m*L=P*S/v;
m=P*S/((кпд/100%)*L*v);
V=m/ro=P*S/((кпд/100%)*L*v*ro)=
=55000*250000/((25/100)*44000000*(108/3,6)*740) м3=<span>
0,056306</span> м3 ~ <span>56,3 л
</span>
R = R1 + R5 + R2·R3·R4/(R2·R3 + R3·R4 + R2·R4) = 10 Ом
I = U5/R5 = 4 A
U = IR = 40 B
U1 = IR1 = 16 B
U2 = U3 = U4 = U - U1 - U5 = 12 B
I1 = I5 = I = 4 A
I2 = U2/R2 = 2.4 A
I3 = U3/R3 = 1.2 A
I4 = U4/R4 = 0.4 A
Ответ: I1 = 4 A, I2 = 2.4 A, I3 = 1.2 A, I4 = 0.4 A, I5 = 4 A, U1 = 16 B, U2 = U3 = U4 = 12 B, R = 10 Ом, I = 4 A, U = 40 B
1) F=k*e^2/R^2=9*10^9*(1,6*10^-19)^2/1^2=23,04*10^-29 H
2) R=p*L/S=2,8*10^-2*0,7/0,2=9,8*10^-2 Ом
3) R=R1*R2/(R1+R2)=3*6/(3+6)=2 Ом
U=I1*R1=2*3=6 В I2=U/R2=6/6=1 A I=I1+I2=2+1=3A
4) m=k*I*t t=m/k*I=10^3/0,093*10^-6*40*10^-3=269*10^3 c=74,72 ч
A=I*U*t=5*40*74,72=14944 кВт*ч или 5,38*10^10 Дж