When work is done on a system while additional heat is subtracted, the temperature of the system
A) increases.
B) decreases.
C) remains unchanged.
D) need more information
Answer: D
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A point charge of 3.00 ?C is located on the y-axis at y = 4.0 m, another point charge of 6.0 ?C is located on the x-axis at x = 5.0 m, and a third charge of 7.2 ?C is located at (5.0 m, 4.0 m). What is the magnitude of the force on the 7.2 ?C charge?
A. 
B. 
C. 
D. 
E. 
From the center outward, which of the following lists the "layers" of the Sun in the correct order?
A) core, radiation zone, convection zone, photosphere, chromosphere, corona B) core, radiation zone, convection zone, corona, chromosphere, photosphere C) core, convection zone, radiation zone, corona, chromosphere, photosphere D) core, corona, radiation zone, convection zone, photosphere, chromosphere
In the above H-R diagram sketch, which star is a blue giant?
A. A B. B C. C D. D E. E
Active galaxies were first discovered by observations in the _______________ wavelength band
Fill in the blank(s) with correct word