Respostas

2013-07-30T13:57:58-03:00
30cm = 0,3m
50cm = 0,5m

Area = 0,3*0,5 = 0,15m² = 15*10^-2m²

ΔS = S - So

ΔS = So * beta * Δt
ΔS = 15*10^-2 * 2,4*10^-5 * 100
ΔS = 15 * 1 * 2,4*10^-5
ΔS = 36*10^-5m² de dilatação
ΔS = 36*10^-5 * 10^2 * 10^2 cm²
ΔS = 36 * 10^-1 cm²
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ΔS= 3,6cm²
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