finalc

# finalc - Exam Name MULTIPLE CHOICE Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A piece of glass (n=1.52) is immersed in diiodomethane (n=1.74). A light ray hits the glass at an incident angle of 40 degrees. What's the angle the refracted beam in the glass makes with the normal to the interface? A) 33 degrees B) 40 degrees C) 47 degrees D) 54 degrees 1) 2) Advertisement for a certain small car claim that it floats in water. The car's mass is 900kg and its interior volume is 3.0 cubic meters. Water gradually leaks in and displaces the air in the car. What fraction of the interior volume is filled with water when the car sinks? A) 30% B) 50% C) 70% D) 90% E) 10% 2) 3) Three polarizing filters are stacked with the polarizing axes of the second and third at 45 and 90 degrees, respectively, with that of the first. Unpolarized light has intensity of 75 W per square cm after it pases through all three polarizers. What's the initial intensity of the light? A) 75W B) 150W C) 300W D) 600W E) 1200W 3) 4) You are shining light with a wavelength of 550nm on a 10-slit aparatus with slit spacing of 1 micron. At what angle from the center do you find the 3rd dark fringe? A) 5 degrees B) 10 degrees C) 15 degrees D) 20 degrees E) more than 25 degrees 4) 5) An engine with a mechanical power output of 17kW extracts heat from a source at 420K and rejects it to a 2000kg block of ice at it's melting point. How long can the engine operate at its efficiency? (Lf=334kJ/kg) A) 1 day B) 3 hours C) for ever D) 12 hours E) 6 hours 5) 6) Two reversible thermodynamic processes connect the same two points in the PV plane. Which of the two processes requires more heat to be added to the system? Process A: Isochoric pressure decrease followed by adiabatic expansion. Process B: Isochoric pressure decrease followed by isothermal expansion. A) Process B requires more heat to be added.

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## This note was uploaded on 09/23/2009 for the course PHYS 2c taught by Professor Wurthmeir during the Spring '05 term at UCSD.

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finalc - Exam Name MULTIPLE CHOICE Choose the one...

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