Giúp mình với ạ💖💖💖
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unpollute
deforestation
environmental
pollution
conservationists
prevention
extremely
environmentalist
protection
seriously
poisonous


Trình thế này là gạch bài nhá. Em vẽ đường sức từ là đường thẳng đi qua trong lòng ống dây và kí hiệu chiều nha


\(\left\{{}\begin{matrix}R1=U1^2:P1=220^2:44=1100\Omega\\R2=U2^2:P2=220^2:66=733,33\Omega\end{matrix}\right.\)
Bóng đèn sáng bình thường, vì: \(U=U1=220V\)
\(\left\{{}\begin{matrix}P=UI=220\cdot\left(\dfrac{44}{220}+\dfrac{66}{220}\right)=110W\\Q_{toa}=A=Pt=110\cdot30\cdot60=198000\left(J\right)\end{matrix}\right.\)
\(A1=P1\cdot t1=66\cdot2\cdot30=3960Wh=3,96kWh\)
\(\Rightarrow T=A1\cdot2200=3,96\cdot2200=8712\left(dong\right)\)
\(R_Đ=\dfrac{U_Đ^2}{P_Đ}=\dfrac{220^2}{44}=1100\Omega\)
\(R_q=\dfrac{U_q^2}{P_q}=\dfrac{220^2}{66}=\dfrac{2200}{3}\Omega\)
\(R_{tđ}=\dfrac{R_Đ\cdot R_q}{R_Đ+R_q}=\dfrac{1100\cdot\dfrac{2200}{3}}{1100+\dfrac{2200}{3}}=440\Omega\)
\(\Rightarrow U_Đ=U_q=U_m=440\cdot0,5=220V\)
\(I_{Đđm}=\dfrac{P_Đ}{U_Đ}=\dfrac{44}{220}=0,2A=I_Đ\)
Đèn sáng bình thường.
late next friday so she can't go the the party
is too expensive so I can't buy it
it was hot, I turned on the air conditioner
to the club because of her illness
her exam because she worked hard
on the air conditioner because it was hot
the hard rain, we stay at home
being sick, she couldn't go to shcool yesterday
Nga's tiredness after her trip, she went to bed early
waking up late, Na didn;t have time for breakfast