At room temperature (20.°C) the area of a hole in a sheet of material is 5.505 cm2. When heated to 830.°C the area increases by 29.0 mm2
(a) What is the thermal coefficient of linear expansion for the material?
(b) If the temperature had decreased to -76.° Fahrenheit, what would be the area of the hole?
(a) 32.5 × 10-6 C°-1
(b) 5.476 cm2
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