What is the luminosity of a star having three times the radius of the Sun and a surface temperature of 10,000 K?
Q: Absolute visual magnitude is a. the apparent magnitude of a star observed from Earth. b. the…
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Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…
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Q: 06
A: Given that:-Luminosity, L=78.4×1026 Watt.Radius, r= 1.2×106 kmr= 1.2×106×103m=1.2×109 mWe know…
Q: Use the luminosity of the sun, 3.83 x 1026 J/s, the total amount of energy it emits each second, to…
A: Let Ls denote the luminosity of the sun. Let E denote the amount of energy radiated by the Sun in…
Q: The radius of the Sun is 7x10⁸ m and its mass is 2x10³⁰kg.What is the density of the Sun (density =…
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Q: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a a.…
A: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a white…
Q: The radius of the sun is approximately 700,000 kilometers. What is the volume of the sun
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Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
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Q: What is the most common type of star?
A: There are different types of stars in our universe. They are mainly categorized based on their mass,…
Q: What is the surface temperature of a star that emits light with a wavelength of 400 nanometers?
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Q: What is the lifetime on the main sequence of a 2-solar-mass star? a. 1.8 × 1011 years b.…
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Q: What type of star has the longest life span? a. O b. K c. B d. A e. M
A: What type of star has the longest life span?
Q: What size star is the sun? O supergiant O medium O giant O white dwarf
A: The sun size is about 696340 km in radius and it's mass is 1.989*10^30 kg.
Q: What is the temperature of a star emitting light with a peak wavelength of 7,080 angstroms? T=…
A: Given : λmax = 7080 angstroms = 7080*10-10 m. From Wien's law the temperature of star is T =…
Q: at what wavelength (in nm) will it radiate the most energy? Is this a cool or hot star?
A: According to Wien's displacement law The peak wavelength relation is given as Peak wavelength =…
Q: A star is observed to be thrice the size of the Sun with temperature of 1.3Tsun. Estimate its…
A: The energy radiated by a star is defined as its luminosity. Luminosity depends on the temperature…
Q: Which of these is NOT used as a spiral tracer? a. O stars b. B stars c. young open clusters…
A: Spiral tracers are objects that are commonly found in spiral arms and soare used to trace spiral…
Q: Which main-sequence star would be the least luminous? a. G1 b. G5 c. G9 d. F0 e. F3
A: Given:Which main-sequence star would be the least luminous.Now, Main sequence stars (V) Spectral…
Q: A turnoff point corresponding to the oldest star cluster would occur at what spectral…
A: Turnoff point in HR diagram is the point where the star leaves the main sequence branch
Q: Which of the following stars are bright and very cool
A: The Supergiants are cool stars, which are very large and really bright. they're located towards the…
Q: Raising a number in scientific notation to a power is easy: (5 x 105)2 = (5)² x (105)2 = 5 x 5 x 105…
A: Given data: Radius of sun (R) = 7×105 km Mass (m) = 2.0×1030 kg π = 3.14 Required: The volume in…
Q: In every nebula, a star is beginning to form. a) True b) False
A: True or False: In every nebula, a star is beginning to form.
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
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Q: What is the Sun's energy output (luminosity)? Group of answer choices About 4 x 1026 Watts About a…
A: We know that, Sun has radius of 695 x 106 m giving a surface area of 6.09 x 1018 m2 .
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Q: If a certain star is 4 times as hot as the sun and is 10000 times brighter than the sun, calculate…
A: Given, Temperature of star, TA=4xTE, Luminosity of star, LA=10000x LE.
Q: How much energy is produced when the sun converts 1 kg of hydrogen into helium?
A: Sun and all other stars get their energy through the process of fusion. In a fusion reaction, two…
Q: What did you calculate for the radius of the star that had a temperature of 5880 degrees Kelvin and…
A: Given : Temperature=T=5880∘ K Luminosity=L=78 W We have to calculate the value of radius R of the…
Q: What is the luminosity of a 4-solar-mass main-sequence star?
A: The luminosity of a star is the amount of energy that it radiates per second. It can be considered…
Q: The Sun has a radius of 6.955×105 km and a mass of 1.989×1030 kg. What is the density of the Sun?…
A: Considering sun as a sphere, the volume of sun is
Q: A star has a luminosity (power output) of 9.2x1026 W and a diameter of 6.1x108 m. What is its…
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Q: For a star with surface temperature 5,100 K, what is the peak frequency of light from the sun?…
A: Given Surface temperature of star T =5100 K We have to find the peak frequency of light from the sun
Q: How do you calculate the mass of a star?
A: To calculate mass of a single star is a difficult process however to calculate the mass of binary…
Q: A star has an apparent magnitude of 6 and an absolute magnitude of 3. How far is the star from…
A: The distance of a star can be measured from its absolute and apparent magnitude. The apparent…
Q: If a star has a surface temperature of 20,000 K (2.00 × 104 K), at what wavelength will it radiate…
A: For calculating the wavelength emitted by a hot body consider it as a blackbody. A blackbody is an…
Q: The surface temperature of the Sun is 5,800 K. What wavelength of light is most intense?…
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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: A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?
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Q: A star has a life expectancy of 5 billion years. What would be its mass?
A: A star will live as long as there are enough fusion reactions inside its core. Once the fusion stops…
Q: D5
A: Given that:-Luminosity, L=78.4×1026 WattRadius, r=1.2×106 km=1.2×106×103 m=1.2×109 mLuminosity,…
Q: Astronomers use two basis properties of stars to classify them. These two properties are luminosity…
A: Introduction: The Hertzsprung–Russell diagram is a scatter plot of stars showing the relationship…
Q: Q3.2 The supergiant star has a surface temperature of about 2900 K and emits a power of…
A: Temperature Power For perfect emitter, emissivity Radius
Q: Consider three main sequence stars: Star A is 14,500 K, Star B is 2,900 K, and Star C is 5,500 K.…
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