A constellation directly overhead at midnight in June will be ________ at midnight in December.
A. on the eastern horizon
B. on the western horizon
C. directly overhead
D. below the horizon
E. None of these choices is correct.
Answer: D
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In a transformer, the relationship between the primary and secondary currents depends on all of the following quantities except:
A. the number of turns the primary and secondary windings have B. the resistance of the windings C. the voltage in the primary winding D. the properties of the core material
A 3 kg mass is positioned at (0, 8), and a 1 kg mass is positioned at (12, 0). What are the coordinates of a 4 kg mass which will result in the center of mass of the system of three masses being located at the origin (0, 0)?
A) (-3, -6) B) (-6, -3) C) (3, 6) D) (-12, -8)
What is the maximum efficiency of a heat engine operating between 293 Kelvins and 273 Kelvins, the temperatures at the surface and several hundred meters below the surface, respectively, of the ocean?
Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. 
At what value of t is the speed of the particle equal to 0 m/s?
A. 0 s B. 1 s C. 2 s D. 3 s E. 4 s