If a star has a surface temperature 2 times lower than the Sun's and a luminosity the same as the Sun, how many times larger is the star than the Sun?

Q: A star has a surface temperature of T = 10,000 K and a radius three times that of the Sun, R = 3R…

A:

Q: A star is known to be moving at 7.87km/s toward the earth. If you observe the spectral line to be at…

A:

Q: The surface of a star usually has the highest temperature O True O False

A:

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: The bright star Spica in the constellation Virgo has a surface temperature about 4.4 times that of…

A: Use formula of luminosity and derive a relation for luminosity , radius and temperature of star and…

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: 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: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. The distance to…

A: Write the equation relating Luminosity Lsn and Lst to the absolute magnitude Msn and Mst of sun and…

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: Star B has a temperature that is 5 times higher than Star A. How much more energy per second…

A:

Q: What is the maximum luminosity for star of 5.76×1010 Msun.

A: In hydrostatic equilibrium, the radiation pressure and gravitational force will balance each other.…

Q: Hertzsprung-Russell Diagram

A: In the sky, there are many groups of stars. Some of them are small. while some of them are large.…

Q: What characterizes a star of spectral-type A in the visible part of the spectrum? Strong lines…

A: Spectral type A has wavelength ranging from 290-390 nm. They have very strong hydrogen lines.

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: sequence

A: Hertzsprung-Russell's diagram clearly shows that the star spends most of its life as a main-sequence…

Q: Using the proportionality relationships for stellar luminosity as a function of mass and stellar…

A: Stellar lifetime is directly proportional to Stellar mass. Stellar luminosity is inversely…

Q: At what wavelengths do stars of surface temperates 20 000 K, 10 000 K, and 3000 K have their peak…

A:

Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…

A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…

Q: Suppose the distance to a star is doubled. Then the luminosity of the star is O Remains the same,…

A: Luminosity and apparent brightness are 2 different things. Luminosity is unique property of body and…

Q: What measurements would you make (assuming you have the money, time, & equipment) to determine a…

A: In this question we have to answer what measurements we will make to determine the surface…

Q: ou observe a star with a telescope over the course of a year. You find that this star has a flux…

A: .In vertical direction:psinθ=40sin60Psinθ=4032Psinθ=34.6410 free body diagram:

Q: Use the Luminosity Distance Formula. Find the distance to a star (L=2.2x1026 watts) whose apparent…

A:

Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. The distance to…

A: Given,  Parallax angle is 0.0270 arcseconds  apparent magnitude of 4.641 distance is 37.03 parsecs…

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…

A: vr=cλ0-λλ0

Q: As we read in the book, a star that appears to be 1 magnitude brighter will have approximately 2.5…

A: Required : Approximate ratio of the flux.

Q: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…

A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…

Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the…

A: Wavelength of (λ°) = 481.6 nm Difference of wavelength ∆ λ = λ- λ° = 486.1- 485.8 =  0.3 nm Speed of…

Q: 1:Which star has been redshifted the most? 2:Which star is moving towards us the fastest? Star C…

A: Redshift star: The star is said to be redshifted when it shows the displacement of its spectral…

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: 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: We will take a moment to compare how brightly a white dwarf star shines compared to a red giant…

A: The luminosity () of a star is related to its surface temperature () and radius () through the…

Q: The main-sequence age of a star of 1M⊙ is about 1010 years. What is the main-sequence age of a star…

A: Answer the following question is

Q: Compute the distance to the following stars using the luminosity-distan relationship: m-M=5 log (d)…

A: Apparant Magnitude (m) = 9.95Absolute Magnitude (M) = 0.75