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Le flux thermique ?1 = ?Q/?t = Sx (?chaude ? ?froide) Correction exercices Chap 3 1STI2D. Améliorer l'isolation p86. 1- Le flux thermique ?1 = ?Q/?t = Sx (?chaude ? ?froide) /R(m.K.W-1). ?1 = 100x(20-5)/0,59 = 2 
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