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At = 2 m²
Ao = ........... ?
T₂ = 100'C
T₁ = 20'C
jawab
At = Ao + ( βΔt )
2 = Ao (2 x 0,000017 x ( 100 - 20 ) )
2 = Ao (0,000034 x 80 ))
2 = Ao (0,00272 )
Ao = 2 - 0,00272
Ao = 1,99728 m²