We know that light is quantized because, in the double slit experiment with light,
A) when dim light is used, the light hits the screen at tiny separated impact points.
B) when the experiment is done in strong light, no interference pattern shows up on the screen.
C) an interference pattern shows up on the screen.
D) when one slit is closed, the light hits the screen at tiny separated impact points.
E) when one slit is closed, no interference pattern shows up on the screen.
A
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Moving electric charges are surrounded by
A. electric fields B. magnetic fields C. both of these answers D. neither of these answers
First Law of Thermodynamics: A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.50 moles of an ideal monatomic gas at 250 K, and the other half is a vacuum. The container is well insulated, so there is no exchange of heat with the surroundings. The membrane breaks, and eventually the gas reaches a new equilibrium condition occupying the entire volume. What is the final temperature of the gas?
A. 100 K B. 125 K C. 157 K D. 180 K E. 250 K
An airplane flying overhead drops a care package directly over Mike at rest in his Corvette. Neglecting air resistance, the package will land
A) behind Mike. B) upon Mike and his Corvette. C) well ahead of Mike and his Corvette.
A 4.00 kg solid sphere of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. The acceleration of the center of mass of the solid sphere is
A. 1.50 
B. 2.00
C. 2.50
D. 3.00
E. 3.50