What is the importance of 1.4 solar masses in stellar evolution?
What will be an ideal response?
1.4 solar masses is the Chandrasekhar Limit. While dwarfs less massive than Chandrasekhar's Limit can remain stable by gravitational contraction for billions of years; above that limit, electron degeneracy will fail to stop the contraction, and the white dwarf will blow up as a Type I supernova, or collapse to a neutron star in a Type II supernova.
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Using ________, scientists can use a few smaller telescopes to take images with the same resolution as a much larger telescope.
A. interferometry B. satellite telescopes C. charge-coupled devices (CCDs) D. adaptive optics
The half-life of a muon is 2.20 ?s as measured in a stationary reference frame. What is the half life of the muon (in ?s) when it is moving with a speed of v = 0.800c?
A. 8.13 B. 2.75 C. 3.67 D. 15.8 E. 1.32
The combining of two nuclei to form a larger nucleus with the release of energy is
a. nuclear fission b. nuclear fusion c. neutron activation d. nuclear emission e. beta decay
A planet has mass M = 8.00 × 10^23 kg. At what distance will the centripetal acceleration of an orbiting space station be equal to the gravitational acceleration on Earth's surface? (G = 6.67 × 10^–11 m3·kg–1·s–1)
a. 2.33 × 10^6 m b. 5.44 × 10^12 m c. 5.23 × 10^14 m d. 1.18 × 10^35 m