Fa08-MT1-Huang-Exam - University of California, Berkeley...

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University of California, Berkeley Physics 7B, Fall 2007 ( Xiaosheng Huang ) Midterm 1 Friday, 10/3/2008 6:00-8:00 PM Physical Constants: Avogadro's number, N A : 6.02×10 23 Gas Constant, R : 8.315 J/mol·K Boltmann's Constant, k B : 1.38×10 -23 J/K Stefan-Boltzmann Constant, σ : 5.67×10 -8 W/m 2 ·K 4 Specific heat for water: c =4.19 × 10 3 J/kg· o C Heat of vaporization for water: L V =22.6 × 10 5 J/kg Heat of fusion for water: L F = 3.33 × 10 5 J/kg Note: Formulaic answers may only involve the quantities given in a problem and constants. 1) (15 pts.) The mean free path of CO 2 molecules at STP is measured to be about 5.6 × 10 -8 m. Estimate the diameter of a CO 2 molecule. Formulaic Answer: Numerical Answer:
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2) (15 pts.) Five multiple choice questions: (i) The blackbody radiation of an object depends on its temperature. The total amount of energy radiated is proportional to a ) T .
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This note was uploaded on 02/04/2010 for the course PHYSICS 7B taught by Professor Packard during the Spring '08 term at University of California, Berkeley.

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Fa08-MT1-Huang-Exam - University of California, Berkeley...

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