The EEF shown is incorrectly drawn because
A. It curves toward the axis in a forbidden region or away from the axis in an allowed region.
B. Its wavy part doesn’t have the right number of bumps.
C. The amplitude of the wavy part varies incorrectly.
D. The wavelength of the wavy part varies incorrectly.
E. One of the exponential-like tails has the wrong length.
C. The amplitude of the wavy part varies incorrectly.
D. The wavelength of the wavy part varies incorrectly.
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Suppose you stretch a rubber band. The work you do on the rubber band is
A. positive. B. negative. C. zero.
The smaller the frequency of light, the smaller the ______________ of its photons
a. wavelength b. speed c. mass d. energy
Which of the following statements about eclipses is true?
A. A partial solar eclipse happens every month, but not the total solar eclipse. B. A total solar eclipse is visible from any location on the day-side of Earth. C. A lunar eclipse is visible from any location on the night-side of Earth. D. All of these choices are correct.
Potential Energy: In the figure, +4.0-?C and -4.0-?C point charges are located as shown. Now an additional +2.00-µC point charge is placed at point A. What is the electric potential energy of this system of three charges, relative to infinity? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. +264 mJ B. -264 mJ C. 0.00 J D. -26.4 mJ E. +26.4 mJ