What is Charon?
A) a captured moon of Neptune B) the largest known Kuiper belt object
C) the largest known asteroid D) the largest of Pluto's five known moons
D
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What is the period for a frequency of 60 Hz?
A. 60 s B. (1/60) s C. 120 s D. (1/120) s E. (1/377) s
The blue stragglers represent the horizontal branch for globular clusters
Indicate whether the statement is true or false
A rope with a total mass of 25.0 kg is tied to a tree on one side of a 125 meter wide ravine, and you're pulling on the other end of the rope with a force of 415 N
If you pluck the rope, how long will it take the pulse to travel across the ravine to the tree?
In a shadow play, the actors are behind a translucent screen and the audience only sees their two-dimensional shadows on the screen
Assume that the lighting is such that the dimensions of objects are undistorted. In a certain play, a witch is stirring a caldron by moving a spoon, held vertically, in a horizontal circle with a radius of 20 cm, making one revolution every 2.4 s. What is the maximum acceleration of the spoon seen by the audience? A) 0.35 m/s2 B) 1.1 m/s2 C) 1.4 m/s2 D) 0.48 m/s2 E) 0.52 m/s2