volume of the sphere, V (4/3)*pi*(d/2)^3
= (4/3)*pi*(8.15/2)^3
= 283 cm^3
coefficient of volume expansion of aluminum, gamma = 66*10^-6 K^-1
using the equation,
delta_V = V*gamma*(T2 - T1)
= 283*66*10^-6*(150 - 40)
= 2.05 cm^3 <<<<<<<<<<-------------Answer
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