Which term identifies the defect where the lens produces a line image of a point source?
a. myopia
b. presbyopia
c. hyperopia
d. astigmatism
d
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The Babcock model employs differential rotation of the solar surface and a magnetic dynamo to describe the formation of sunspots
a. True b. False Indicate whether the statement is true or false
Municipal recycling programs are generally successful
What will be an ideal response?
What similarity did Isaac Newton perceive between a falling apple and the moon?
A) The velocities of both are directed toward Earth's center. B) Both have a velocities and accelerations directed toward Earth's center. C) Both have accelerations directed toward Earth's center, although the forces on them are in different directions. D) Both have forces on them toward Earth's center, and accelerations directed toward Earth's center. E) Both have forces on them toward Earth's center, but their accelerations are in different directions.
It is late and Carlos is sliding down a rope from his third floor window to meet his friend Juan. As he slides down the rope faster and faster, he becomes frightened and grabs harder on the rope, increasing the tension in the rope. As soon as the upward tension in the rope becomes equal to his weight:
a. Carlos will stop. b. Carlos will slow down. c. Carlos will continue down at a constant velocity. d. the rope must break.