Respostas

2013-08-23T18:12:51-03:00
400cm³ = 400 * 10^-6m³ = 4*10^-4m³

0,05cm³ = 0,05 * 10^-6m³ = 5*10^-8m³

/\S = So * beta * /\T
5*10^-8 = 4*10^-4 * beta * 50

5 * 10^-8 / 200*10^-4 = beta

beta = 5 * 10^-4 / 200

beta = 0,025 * 10^-4

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beta = 2,5*10^-6 °C^-1
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/\S = So * beta * /\T
/\S = 4*10^-4m³ * 2,5*10^-6 * 190
/\S = 10 * 10^-10 * 190

/\S = 1900 * 10^-10 m3
/\S = 1900 * 10^-10 * 10^6 cm³

/\S = 1900 * 10^-4

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/\S = 0,19cm³ de variação na temperatura de 210°C
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