For a white dwarf to explode entirely as a Type I supernova, its mass must be:
A) at least 0.08 solar masses.
B) 1.4 solar masses, the Chandrasekhar Limit.
C) 3 solar masses, the Schwartzschild Limit.
D) 20 solar masses, the Hubble Limit.
E) 100 solar masses, the most massive known stars.
B
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An object transfers heat when its temperature is raised by contact with a
Radio telescopes allow us to observe objects that are too cold to emit strongly in the visible part of the spectrum. Astronomers still use images of these object for study. What kind of images are these?
A. black-and-white images B. false-color images C. artist's renditions D. holographic images E. Astronomers do not use images to study radio objects.
When a beam of light, originally traveling in air, enters a piece of glass having an index of refraction of 3/2, its speed
A) increases by a factor of 3/2. B) is reduced to 2/3 its original value. C) is unaffected.
In nuclear fission,
A. a nucleus is split into two less massive nuclei. B. two heavy nuclei are induced to decay simultaneously. C. a nucleus is bombarded with another nucleus in order to induce an alpha decay. D. high-energy particles are released from a nucleus that is at rest.