Why are metals less abundant in older stars than in younger stars?
Q: Star A and Star B are both on the main sequence. Star A is 74 times more luminous than Star B. What…
A:
Q: All stars start their lives with the same basic composition. What determines their differences? O…
A: Mass they formed with
Q: More massive stars form more rapidly. (T/F)
A: Stars are formed from the interstellar medium. The interstellar medium contains hydrogen and helium…
Q: If a star has a surface temperature 2 times lower than the Sun's and a luminosity the same as the…
A: Given, If To is the surface temperature of the sun, Lo is the luminosity of the sun Then for the…
Q: If a star has a radius 2 times larger than the Sun's and a luminosity 1/4th that of the Sun, how…
A: Given that Radius of star, R = 2 luminosity of the star ,
Q: If one star has a temperature of 5,000 K and another star has a temperature of 8,500 , how much more…
A:
Q: What property of a star had a greater effect on the amount of light emitted—its temperature or its…
A: A very small increase in the temperature of star can significantly increase the energy emitted per…
Q: How do the temperature and size of a Sun-sized star fluctuate over the course of its life?…
A: Immediate Assistance : You cannot wait for help if you require quick aid. Because it also implies…
Q: Which stars are associated with a planetary nebula? black holes, neutron star's, white dwarf or main…
A: Required : What are planetary nebula associated with.
Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…
A: Required : Spectral type, absolute magnitude, temperature and luminosity of star E.
Q: For each type of stellar explosion, identify its progenitor star
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Q: Star A has a temperature of 3000K; Star B has a temperature of 5000K; Star C has a temperature of…
A: Given value--- temperature of star A = 3000 K. temperature of star B = 5000 K. Temperature of…
Q: If a star has a surface temperature 3 times higher than the Sun's and a luminosity 324 times larger…
A: Luminosity is defined as the radiant power emitted y a light-emitting object like a star. Stars…
Q: How does the extreme temperature sensitivity of the CNO cycle affect the structure of stars?
A: As a result of the extreme temperature dependence of CNO burning, those stars that are dominated by…
Q: The percentage of helium used immediately during a star’s helium flash phase is
A: It is a very brief phase
Q: Why does the luminosity of a star depend on both its radius and its temperature?
A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
Q: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
Q: At what wavelengths do stars of surface temperates 20 000 K, 10 000 K, and 3000 K have their peak…
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Q: What causes a star to move off the main sequence?
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Q: If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength…
A: Concept: "The Wien's displacement law states that the wavelength carrying maximum energy is…
Q: Consider three main sequence stars: Star A is 12000 K, Star B is 6000 K, Star C is 3000 K. What are…
A: Given, Star A = 12000 K temprature Star B = 6000 K temprature Star C = 3000 K temprature So the…
Q: Why do distant stars look redder than their spectral types suggest?
A: The pace is mostly empty but there are areas of large density of the interstellar medium. It…
Q: What is hydrostatic equilibrium in stars.
A: The interstellar medium is mostly made of hydrogen. When the mass of the interstellar medium becomes…
Q: If an open cluster contains 450 stars and is 21 pc in diameter, what is the average distance between…
A: Given Number of stars in an open cluster (n) = 450 Diameter of the cluster Dclu = 21 pc…
Q: Why don't red dwarfs become giant stars?
A: Red dwarf stars or M-type stars are small stars with a mass of 0.08 to 0.6 times the mass of the…
Q: Why do metal-poor stars have a wider range of orbital shapes than metal-rich stars like the sun?
A: Stars are classified into two categories. Population I and Population II. Population I stars are…
Q: Why is it, that a star which uses up the hydrogen in its core, swells to enormous size and changes…
A: Required : Why does a star which uses up the hydrogen swells to enormous size and changes color.
Q: why are Cepheid variable stars good distance indicators? What about supernovae?
A: Named after delta-Cephei, Cepheid Variables are the most important type of variable because it has…
Q: Consider the following question: How many times bigger than the sun would a cool star (4000K) have…
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Q: Why does a star's life expectancy depend on its mass?
A: Stars are formed due to the gravitational collapse of interstellar gas. This collapse is…
Q: In which component of the interstellar medium do new stars form? O molecular clouds O HII Intercloud…
A: Interstellar medium is the medium between matter and radiation. The matter are gases (gas cloud),…
Q: What is fusion? How does it happen inside a star?
A: Nuclear fusion is the process by which two light atomic nuclei combine to form a single heavier one…
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- The main-sequence age of a star of 1M⊙ is about 1010 years. What is the main-sequence age of a star of 10M⊙?Sun-like star transitions into a Red Giant __________. Group of answer choices after the planetary nebula stage once carbon burning ends in the core During the T-Tauri phase before and after the helium flashWhy do stars tend to form in groups?
- The Orion Nebula is about 20 light-years (20 × 1018 cm) across, enclosing a roughly spherical area with a volume of 4.19 × 1057 cm3. Calculate the number of 0.1 solar mass stars that might be formed in such a nebula. Assume that the nebula has a density of 1000 atoms/cm3.Why is it that we can describe the life cycle of a star and be confident about it?Consider three main sequence stars: Star A is 14,500 K, Star B is 2,900 K, and Star C is 5,500 K. What are the colors of each of these stars?