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Câu 4:

Định luật Fourier $q = - \lambda .gradt$

Câu 4: Định luật Fourier q=−λ.gradtq = - \lambda .gradtq=−λ.gradt có:

Thông tin câu hỏi

Câu 4:

Định luật Fourier $q = - \lambda .gradt$ có: