Answered: If a star has M = 100Msun and L =… | bartleby

Related questions

Question

If a star has M = 100Msun and L = 10^6Lsun, how long can it shine at that luminosity if it started as pure hydrogen and is able to convert 10% of its H to He? If a star has M = 0.5Msun and L = 0.1Lsun, how long can it shine under the same conditions?

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 5 steps

SEE SOLUTION Check out a sample Q&A here

Blurred answer

Similar questions

I attempted to answer this question and I'm not sure what I am doing wrong. My formula says A.S. = 206265 (separation/distance from observer) I know to convert to the same units, so I ended up with 80 Million Km being 8 x 10 ^ -6 LY Could you please explain each step especially for the part that I got wrong for both A and B?
Sirius is the brightest star in the sky (but is located in the Southern hemisphere). It has a luminosity of 25.4 LSun and is 2.67 parsec away (1 parsec= 3.086 ×1016 m). What flux is received on Earth from Sirius? How manytimes smaller is this than the flux from the Sun?
A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES MASS VANISH as H is fused to He in the star’s core? Note: When we say “mass vanish '' what we really mean is “gets converted into energy and leaves the star as light”. Note: approximate answer: 3.55 E14 kg/s b. At what rate is H converted into He? To do this you need to take into account that for every kg of hydrogen burned, only 0.7% gets converted into energy while the rest turns into helium. Approximate answer = 5E16 kg/s c. Assuming that only the 10% of the star’s mass in the central regions will get hot enough for fusion, calculate the main sequence lifetime of the star. Put your answer in years, and compare it to the lifetime of the Sun. It should be much, much shorter. Approximate answer: 30 million years.
answer for 3
How many times hotter than our sun is the hottest type O star, which has a surface temperature 40,000 K? Number times hotter =
The three most prominent spectral lines of hydrogen are H-α at 656 nm, H-β at 486 nm, and H-γ 434 nm. If we observe an object with H-α at a wavelength of 700 nm, what wavelength will we observe H-β and H-γ? Is the object moving toward or away from us, and how do you know? Suppose we observe another object with H-α at 585 nm. Is this object moving toward or away from us? Is it moving slower or faster than the first object?
What is the luminosity of a star having four times the radius of the Sun and a surface temperature of 8,000 K?
I need the answer as soon as possible
Studying the spectrum of a star, we see that the Haline (l= 656.285nm) has been shifted to 656.286 nm. Is the star moving towards us or away (explain your answer) How fast is the star moving with respect to us?
(Answer don't copy with hand written please)As a star runs out of hydrogen to fuel nuclear fusion in its core, changes within the star usually cause it to leave the main sequence, expanding and cooling as it does so. Would a star with a radius 12 times that of the Sun, but a surface temperature 0.5 times that of the Sun, be more, or less luminous than the Sun? Show and explain your reasoning. You may assume the surface area of a sphere is A = 4πr2.