Mv²/2= mgh<span>
</span> v²/2=gh
v=√(2gh)=√2•9,8•5=9,9 м/с
U2=U3=I3*R3=2*6=12 B
I2=U2/R2=12/3=4 A
I1=I2+I3=4+2=6 A
P1=I1^2*R1=6^2*5=36*5=180 Вт
<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>
L=9*10^-3 Гн I=12 A Ф=?
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Ф=L*I=9*10^-3*12=0.108 Вб
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