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Hw 7 (phy317k)

# Hw 7 (phy317k) - PHY 317K HOMEWORK 7 DUE on December 4 2008...

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PHY 317K HOMEWORK # 7 DUE on December 4, 2008 by 8:00pm Instructions: Use a UT ANSWER SHEET to mark answers. Provide your NAME (last, first), UTEID , and UNIQUE NUMBER of the course. Sign and date it. The answer sheets must be placed in the 317K box located outside PAI 2.48. Late homework will not be graded . Answer the following 58 questions. 1. If two objects are in thermal equilibrium with each other A) they cannot be moving B) they cannot be undergoing an elastic collision C) they cannot have different pressures D) they cannot be at different temperatures E) they cannot be falling in the Earth's gravitational field 2. In constructing a thermometer it is NECESSARY to use a substance that: 3. When a particular constant volume gas thermometer is in thermal contact with water at its triple point (273.16 K), the pressure is 5.55 × 10 4 Pa. For this thermometer 1 K corresponds to a change in pressure of about: 4. When the temperature of a copper penny is increased by 100 C ° , its diameter increases by 0.17%. The area of one of its faces increases by: Page 1

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5. The coefficient of linear expansion of iron is 1.1 × 10 –5 per C ° . The volume of an iron cube, 4.00 cm on each edge, will increase by what amount if it is heated from 15 ° C to 72 ° C? A) 0.01 cm 3 B) 0.07 cm 3 C) 0.12 cm 3 D) 0.23 cm 3 E) none of these 6. Heat is: 7. Heat has the same units as: 8. The heat capacity of an object is equal to: 9. The specific heat of a substance is equal to: A) the amount of heat energy required to change the state of one gram of the substance B) the amount of heat energy per unit mass emitted by oxidizing the substance C) the amount of heat energy per unit mass required to raise the substance from its freezing to its boiling point D) the amount of heat energy per unit mass required to raise the temperature of the substance by 1 C ° E) the temperature of the object divided by its mass Page 2