The brightest star in the northern celestial hemisphere has a surface temperature of about 4300 K...
The brightest star in the northern celestial hemisphere has a surface temperature of about 4300 K and it is 170 times more luminous than the Sun. Calculate the radius of the star in units of the radius of the solar radius (round the result to the nearest integer)
In the calculation, you may assume that the Sun has a radius of 7E8 meters and a luminosity of 3.8E26 watts.
Homework Answers
![From stefans Law, power radiated Po [47R] TY Pstar = 170 PSUN 2 170 X 3.8 x 10 Pston 170x3.8x128 - 5.69x108 [SAR] [4300] -](http://img.homeworklib.com/questions/88dc2820-404c-11eb-a80c-a58e1898f0db.png?x-oss-process=image/resize,w_560)
Add Answer to:
The brightest star in the northern celestial hemisphere has a
surface temperature of about 4300 K...
6. The bright star Arcturus in the constellation Boötes has a surface temperature about 0.74 times...
6. The bright star Arcturus in the constellation Boötes has a surface temperature about 0.74 times that of the Sun. Its luminosity is about 170 times that of the Sun. (a) What is Arcturus’ radius compared to the radius of the Sun (in units of solar radii, ?⊙)? (b) What type of star is Arcturus (a dwarf, a giant, or a supergiant)? Explain your reasoning.
The bright star Rigel in the constellation Orion has a surface temperature about 1.6 times that...
The bright star Rigel in the constellation Orion has a surface temperature about 1.6 times that of the Sun. Its luminosity is about 64,000 times that of the Sun. What is Rigel's radius compared to the radius of the Sun (in units of solar radii, Rø)?
The luminosity of a star with a radius of (7.20x10^6) meters and a surface temperature of...
The luminosity of a star with a radius of (7.20x10^6) meters and a surface temperature of 30,000 Kelvin is ______ Watts
An O star has a temperature of 20,000 K and a radius 10 x that of...
An O star has a temperature of 20,000 K and a radius 10 x that of the Sun. How much more luminous is the O star than the Sun? At what distance would the O star have to be placed to appear to be the same brightness as the Sun. Express your answer in AU and light-years.
Question 16 (1 point) Visible light has wavelengths ranging between approximately 4000 and 7000 Angstroms (400...
Question 16 (1 point) Visible light has wavelengths ranging between approximately 4000 and 7000 Angstroms (400 to 700 nanometres). Which of the following statements is true regarding the surface temperature of a star for which the wavelength of maximum intensity falls in the visible range t could never be cooler than 8000 K It must always be cooler than 5500 K t must lie between 8000 K and 5500 K It must always be hotter than 3500 K Question 17...
A red giant star has a temperature of 4500 K and a luminosity of 10700 LSun....
A red giant star has a temperature of 4500 K and a luminosity of 10700 LSun. How many times bigger is this star than the Sun?
Imagine we find a star that has the same radius as the Sun, but its temperature...
Imagine we find a star that has the same radius as the Sun, but its temperature is 9.6 times greater. That star should be _____ times as luminous as the Sun. Suppose we find a planet with an orbital period of 200 days around a star with the same mass as the Sun, but only 75 percent as luminous. What is the planet’s semi-major axis, in AU?
Stellar RadiiThe red supergiant (RSG) star Betelgeuse has a luminosity of 120,000L, and a surface temperature...
Stellar RadiiThe red supergiant (RSG) star Betelgeuse has a luminosity of 120,000L, and a surface temperature ofaboutTeff= 3650 K. What is its’ radius (in both metres and astronomical units)?
C. i. As a star runs out of hydrogen to fuel nuclear fusion in its core,...
C. i. 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 100 times that of the Sun, but a surface temperature 0.4 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...
the radius of a star that has a surface temperature of 27,000K and is 10000 times...
the radius of a star that has a surface temperature of 27,000K and is 10000 times brighter than the sun radius is ___ RSun?
Question 16 (1 point) Visible light has wavelengths ranging between approximately 4000 and 7000 Angstroms (400 to 700 nanometres). Which of the following statements is true regarding the surface temperature of a star for which the wavelength of maximum intensity falls in the visible range t could never be cooler than 8000 K It must always be cooler than 5500 K t must lie between 8000 K and 5500 K It must always be hotter than 3500 K Question 17...
C. i. 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 100 times that of the Sun, but a surface temperature 0.4 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...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago