α of gold is 14.3x10^-6/C°. The density of gold is 19.3 g/cm^3 at 20℃. Determine its density at 140℃.
T1 = 20oC.
T2 = 140oC.
D = Do + Do*a*(T2-T1)
Density = 19.3 + 19.3*14.3*10^-6/oC*(140-20)oC = 19.333 g/cm^3.
T2 = 140oC.
D = Do + Do*a*(T2-T1)
Density = 19.3 + 19.3*14.3*10^-6/oC*(140-20)oC = 19.333 g/cm^3.