Question

Физика 8 класс, хелп плиз, нужно хотя бы 5,6,7,8.

Answer 1

Ответ:

Объяснение:

#5

$C = \dfrac{\varepsilon\varepsilon_0S}{d} \to d = \dfrac{\varepsilon\varepsilon_0S}{C} = \dfrac{6*8.85*10^{-12}*1.4*10^{-3}}{1400*10^{-12}} = 5.31*10^{-5}~m=0.0531~mm$

#6

$C = \dfrac{\varepsilon\varepsilon_0S}{d} \to S = \dfrac{dC}{\varepsilon\varepsilon_0} = \dfrac{10^{-3}*1}{1*8.85*10^{-12}} = 112994350~m^2=113~km^2$

#7

$C_{\sum} = \dfrac{C_1C_2}{C_1 + C_2} + C_3 = \dfrac{2*3}{2+3} + 0.8 = 2~mcF$

#8

$U_1 = \dfrac{q_1}{C_1}\\U_2 = U_1 = \dfrac{q_1}{C_1}\\q_2 = U_2C_2 = \dfrac{q_1C_2}{C_1} = \dfrac{2*10^{-6}*1.5*10^{-6}}{10*10^{-6}} = 3*10^{-7}~C = 300~nC$

#9

$C = \dfrac{\varepsilon\varepsilon_0S}{d} = \dfrac{6*8.85*10^{-12}*0.0035}{0.0014} = 1.3275*10^{-10}~F = 0.13275~nF\\q = UC = 300*1.3275*10^{-10} = 39.825~nC$