Because of stellar nucleosynthesis, the spectra of old stars show more heavy elements than those of young stars. (T/F)
Q: The surface of a star usually has the highest temperature O True O False
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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: Why are metals less abundant in older stars than in younger stars?
A: Answer: The metals which basically are non hydrogen and helium material are produced or created in…
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: Suppose a star has the same luminosity as our Sun (3.8x1026watts3.8x1026watts) but is located at a…
A: as per our guidelines, we can answer only first question. please resubmit rest questions for…
Q: Which spectral line does this likely correspond to?
A: we can use the doppler shift formula to find laboratory wavelength.
Q: All of the single red-dwarf stars that ever formed are still on the main sequence today. (T/F)
A: Main sequence stars are those which are fusing hydrogen to helium in their cores. Almost 90% of the…
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: 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
A:
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: Star B has a temperature that is 5 times higher than Star A. How much more energy per second…
A:
Q: If parallax of a star is 0.22 arc-seconds and its apparent brightness is 50 x 10-6 W/m2 . What is…
A: Given: Apparent Brightness,b=50×10-6W/m2Parallax of star,p=0.22arc-secondsDistance to the…
Q: The apparent magnitude of a star is observed to vary between m = +0.4 and m = +0.1 because the star…
A: Given: The apparent magnitude of the star varies between m+ = 0.4 and m- = 0.1 The radius of the…
Q: Assuming that at the end of the He burning phase of the stellar core (r R_core). Calculate the…
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Q: Let’s say you’re looking for extrasolar planets. You observe a star that has a spectral shift in the…
A: Write down the values using suitable variables. Here, c signifies the speed of light in a vacuum.
Q: The percentage of helium used immediately during a star’s helium flash phase is
A: It is a very brief phase
Q: Why massive stars are short lived?
A: A massive star has a shorter life spanthan an average star because of fasterhydrogen fuel…
Q: Mention a method to measure temperature of a star.
A: Temperature of the stars cannot be measured directly as they are very far.
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: If the surface Temperature of a star was about 11000.0 K instead of 7000.0 K what is the ratio of…
A: Given , temperature of the star is 11000 K instead of 7000 K How many times greater is the magnitude…
Q: Explain how some stars form in binary systems.
A: There are number of ways stars can be formed in binary systems. They are discussed below.
Q: What stops the production of energy in the evolution of a high mass star?
A: Required: We need to find what stops the production of energy in the evolution of a high mass star.…
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 an M-dwarf star of mass 0.1M⊙ and luminosity 10−3L⊙. When the star joins the main sequence…
A: Luminosity of the star is defined as the power emitted by the star. Power is simply the energy…
Q: The luminosity class of a star tells an astronomer: O how long ago the star formed O whether the…
A:
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: Calculate the surface temperature of the star (in K), if the radius of the star is 4,3x10° m and the…
A: Given : radius of star R = 4.3 x 108 m mass lost per second = 26 x 1010 kg…
Q: Many of the bright stars in the night sky are highly luminous normal blue stars (such as Acrux), and…
A: Given: The distance between the bright star and the earth is r = 620 light years The luminosity of…
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: In a star of 1 solar mass (M☉), the core hydrogen burning phase, also known as the main sequence…
A: In the field of stellar evolution, there is a principle that the lifetime of a star on the main…
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: If a T Tauri star is the same temperature as the Sun but is eighteen times more luminous, what is…
A:
Q: Consider the following question: How many times bigger than the sun would a cool star (4000K) have…
A:
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: Describe the principle of hydrostatic equilibrium as it relates to the internal structure of a star.
A: Stars are formed due to the gravitational collapse of interstellar gas and fusion reaction. The…
Q: The spectrum of a star has very strong hydrogen absorption features, as strong as any ever seen in…
A: The intrinsic color of a star is the color it would appear to have if there were no extinction due…
Q: a star with a radius of 12 that of the sun but a surface temperature of 0.5 times that of the sun be…
A: The luminosity of a star can be given by Stefan-Boltzmann's law as L=σAT4σ is Stefan-Boltzmann…
Q: Why do old stars have less metal compared to new ones?
A: As per the Big Bang theory, the universe expanded from an initial high-density state. In the…
Q: Place the following events in the formation of stars in the proper chronological sequence, with the…
A: The question can be solved as follows
Q: 50,000 20,000 Surface Temperature (C) Would the surface temperature of the stars classified as white…
A: Surface temperature of white dwarfs is around 20000K And for giant it is 2500 to 4000K
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