Предмет: Алгебра, автор: gorynich

помогите пожалуйста!!!!!!

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Автор ответа: NNNLLL54
0
P=sigma ST^4,; ; to \\T^4=frac{P}{sigma S}=46,17cdot 10^{12}cdot 2565,7cdot 10^{-8}cdot 10^{11}=\\=2073,6cdot 10^9=20736cdot 10^8\\T=sqrt[4]{20736cdot 10^8}=12cdot 10^2=1200\\2); V=frac{1}{3}SH=frac{1}{3}cdot 8^2cdot 2=frac{128}{3}
Автор ответа: Artem112
0
P=sigma ST^4 \ T= sqrt[4]{ frac{P}{sigma S} } \ T= sqrt[4]{ cfrac{46.17cdot10^{12}}{5.7cdot10^{-8}cdot frac{1}{256}cdot10^{11}} } = sqrt[4]{ frac{81cdot256}{10^{-8}} } = frac{3cdot4}{10^{-2}} =1200(K)
Ответ: 1200

V= frac{Sh}{3} = frac{a^2h}{3} \ a= frac{d}{ sqrt{2} } =cfrac{ 2 sqrt{l^2-h^2} }{ sqrt{2} } =sqrt{2(l^2-h^2)} \ V = frac{( sqrt{2(l^2-h^2)} )^2h}{ 3} = frac{2(l^2-h^2)h}{3} \ V = frac{2cdot(8^2-2^2)cdot2}{3} =80
Ответ: 80
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