White dwarfs lie on the lower left portion of the H-R diagram
Indicate whether the statement is true or false
TRUE
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What makes dark matter and dark energy so mysterious and so important?
A. We don't exactly know what they are, but they are the determining factors of the stellar evolution and planet formation. B. We don't have strong evidence that they exist, but they could influence the motion of stars in Milky Way Galaxy. C. We don't exactly know what they are, and they make up the majority of the total energy content of the universe. D. We don't have strong evidence that they exist, and they could strongly influence the processes occurring in our Solar System.
The figure above shows how the luminosity of supernovae changes over time. Which type of supernova is the most luminous one year after the explosion?
A) massive star supernova B) white dwarf supernova C) impossible to tell from the graph
A certain amount of ideal monatomic gas is maintained at constant volume as it is cooled from 455K to 405 K. This feat is accomplished by removing 400 J of heat from the gas. How much work is done by the gas during this process?
The ideal gas constant is R = 8.314 J/mol ? K. A) 0.00 J B) 200 J C) 400 J D) -400 J E) -200 J
As more lamps are put into a series circuit, the overall current in the power source
A) increases. B) decreases. C) stays the same.