USA. It is faraway country, on the other side of the world. It is country of contrasts and great opportunities. There are a number of time zones and two oceans, the Pacific and the Atlantic, between us. And what attracts me to it?
The US is state with rich cultural heritage and fascinating history. It has passed a long way of formation and has earned respect from other countries. During the Second World War the US had been a reliable support for the Soviet Union because it had helped much in the fight against the fascism.
America gave the world a lot of great people, such as Abraham Lincoln, James Fenimore Cooper, Ernest Hemingway and Martin Luther King. This list is endless. We should not forget about Christopher Columbus, because he had discovered this previously unknown continent.
Объяснение:
я не знаю это правильно или не правильно
Без схемы соединений такие задачи не решаются,
а моя знакомая гадалка куда-то с утра улетела.
Предположу, что все элементы цепи соединены
последовательно, если нет, то пеняй на себя, двоечник.
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Тогда общее сопротивление:
Ƶ=√{(R₁+R₂)²+(Xʟ-Xc)²}=√{(4+4)²+(6-12)²}=√100=10 Ом.
I=√(S/Ƶ)=√(360/10)=√36=6 A;
P=I²*R=I²*(R₁+R₂)=6²*8=288 Вт;
Q=√(S²-P²)=√(360²-288²)=216 ВАp;
Uʀ₁=Uʀ₂=I*R₁=I*R₂=6*4=24 B;
Uʟ=I*Xʟ=6*6=36 B;
Uc=I*Xc=6*12=72 B;
U=S/I=360/6=60 B;
cos φ=R/Ƶ=(R₁+R₂)/Z=8/10=0,8.
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P.S. Z (Ƶ) без "черты посередине" тоже работает:
не у всех же есть с чертой.
ツ
