Process of Science: Describe a hypothetical observation of a white dwarf that, if made and verified by others, would dramatically challenge our physical understanding of them
What will be an ideal response?
The discovery of a white dwarf with a mass greater than the Chandrasekhar limit.
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Why are nearly all recently built astronomical telescopes reflectors instead of refractors?
What will be an ideal response?
The SI unit for electric potential energy is equivalent to
A. N·m. B. V·C. C. N/m. D. C·m2. E. none of these choices are correct
Find the average density of a red giant star with a mass of 20 × 1030 kg (approximately 10 solar masses) and a radius of 150 × 109 m (equal to the Earth's distance from the Sun).
A. 1.41 × 10?4 kg/m3 B. 0.007 kg/m3 C. 1.41 kg/m3 D. 710 kg/m3 E. 1.41 × 10?3 kg/m3
A 3 solar mass main sequence star is at the same distance as a 0.4 solar mass main sequence star. Which star appears brighter?
A. depends on the phase of the Moon B. the 0.4 solar mass main sequence star C. stars are approximately the same brightness D. the 3 solar mass main sequence star E. cannot tell with the information given