Plane polarized light of intensity 
is sent through a polarizer rotated 45
clockwise to the original plane of polarization and then through a second polarizer rotated 45 
counter-clockwise measured from the original plane of polarization. What is the transmitted intensity?
A. 0.71 
B. 0.50
C. 0.35
D. 0.25
E. 0
E. 0
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A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure. If the internal energy of the gas were U0 before the expansion, what is it after the expansion?
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The internal energy of air can be increased by
a. compressing it. b. allowing heat to flow into it. c. lifting it. d. allowing it to expand.
A child is riding near the outer rim of a freely-rotating playground merry-go-round. What happens if the child walks towards the center?
What will be an ideal response?