Work Done by a Gas: A gas expands at constant temperature from an initial volume of 0.040 m3 and an initial pressure of 210 kPa until its pressure drops to 135 kPa. How much work is done by the gas during this expansion? (R = 8.31 J/mol ? K)
A. 3.0 kJ
B. 3.7 kJ
C. 4.1 kJ
D. 5.6 kJ
E. 7.9 kJ
Answer: B
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at point b? 
A. ?0 I/4?R B. ?0 I/2?R C. ?0 I/?R D. ?0 I/R E. (2 + ?)?0 I/4?R F. Zero
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. Which of the following is a potential that is associated with this force?
A.
B.
C.
D.
E.
A raindrop is doing its part to form a primary rainbow. Red and blue light enter near the top of the raindrop together from the sun. Both red and blue are reflected once at the back surface of the drop, but when the two rays emerge on the sunward side
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