Dr. Chuck projects a ball horizontally from a lab bench. If the projection speed of the ball were greater, the time in the air would be
A) less.
B) the same.
C) greater.
Answer: B
Physics & Space Science
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Which of the beams is due to an energetic light wave?
A) a B) b C) c D) a and c E) all of the above
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Which of the following asteroids is now officially a dwarf planet?
A. Itokawa B. Ceres C. Eros D. Mathilde E. Ida
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Approximately how long ago was Pluto discovered?
A) about 2000 years ago B) about 25 years ago C) about 75 years ago D) in ancient history E) about 200 years ago
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What is the change in entropy (?S) when one mole of silver (101 g) is completely melted at 961°C? (The heat of fusion of silver is 8.82 × 10^4 J/kg.)
a. 9.27 J/K b. 7.22 J/K c. 3.61 J/K d. 14.4 J/K e. 5.22 J/K
Physics & Space Science