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Unformatted text preview: If the rod in part (a) is cooled from to 15 to -15 o C what type and magnitude of stress. (Modulus of elasticity of brass is 97 GPa and coefficient of thermal expansions is 20.0x10-6 ( o C)-1 . 2. Estimate the energy required to raise the temperature of 5 kg of aluminum materials from 20 to 150 o C. Specific heat of aluminum is 900 J/kg-K. 3. Heat capacity is a property that is indicative of a materials ability to absorb heat from the external surroundings; it represents the amount of energy required to produce a unit temperature rise. TRUE / FALSE 4. The heat capacity of solids increases/decreases (circle correct answer) with temperature up to the Debye temperature above which it decreases with temperature. TRUE / FALSE 1 point 1 point 1 point 1 point 1 point for unit 1 point 1 point 0.5 point for unit 1 point 0.5 point for unit 1 point...
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- Fall '08