On the main screen of the interactive figure, select "Parallax", then select the "Introduction to Parallax" button. Click the play button to watch the animation, and watch how the motion of the photographer (lower window) affects what the camera sees (upper window). Which of the following statements correctly describes what is really happening? (Note: You need not continue with the next button to answer this question.)
A. The photographer is moving, but the person being photographed and the trees are staying still.
B. The trees are moving more slowly than the person being photographed, who is moving more slowly than the photographer.
C. The photographer is staying still, but the person being photographed and the trees are moving.
D. The photographer, the person being photographed, and the trees are all moving at the same speed.
Answer: A. The photographer is moving, but the person being photographed and the trees are staying still.
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Which of the following countries produces the most carbon from fossil fuels, per person?
A) China B) Japan C) Western Europe D) United States E) former Soviet Union
A girl is standing in front of a concave mirror. Consider two rays of light, one from her nose and one from her mouth that are parallel as they are traveling toward the mirror. These rays will come together
a. at the focal point. b. at the center of curvature. c. at the image point. d. behind the mirror if she is too close to the mirror.
A battery is attached to several different capacitors connected in parallel. Which of the following statements is true?
1.All capacitors have the same charge, and the equivalent capacitance is greater than the capacitance of any of the capacitors in the group. 2.The capacitor with the largest capacitance carries the smallest charge. 3.The potential difference across each capacitor is the same, and the equivalent capacitance is greater than any of the capacitors in the group. 4.The capacitor with the smallest capacitance carries the largest charge. 5.The potential differences across the capacitors are the same only if the capacitances are the same.
The reaction 2H + 2H ? 3H + 1H releases 4.03 MeV of energy. If one kilogram of deuterium were made to go through this reaction, how much energy would be produced?
A) 9.7 × 107 J B) 9.7 × 1013 J C) 1.9 × 107 J D) 1.9 × 1014 J E) 1.9 × 1011 J