Which letter on the diagram represents White Dwarfs?

Q: Supernova A is farther away than supernova B. The brightness of supernova A will be ________ than…

A: The brightness of supernova and its distance from the observer are related as

Q: Consider two identical stars, A and B. Star B is 10 times farther away than star A. What is the…

A: Two identical stars A and B are given which are at different distances.

Q: Ou re 7 What is the mass of the planet? Express your answer with the appropriate units.

A:

Q: Put the steps of the life cycle of a star in order.

A: Required :  Steps involved in star cycle.

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: Rank the following stars in order of increasing radius: Star A Star B Star C Surface temperature…

A: For star A  Surface temperature =6000 K Luminosity =1 For star B Surface temperature =4000 K…

Q: A star has a parallax of 0.8 seconds of arc. What is the distance of the star?

A: Parallax can be defined as the change in the position of an object due to a change in the observer's…

Q: Which of the following is least reasonable regarding a star's position on the HR diagram? Group of…

A: "White dwarfs are small and cool and are located in the lower left part of the HR diagram."This…

Q: The red supergiant star in Orion is called Betelgeuse, and its distance is 130 pc. What is the…

A: Parallax is the defined as the apparent shift in the position of any star (or other object) against…

Q: Which star in the table below has the greatest diameter?     Star Name d (parsecs) Parallax…

A: d. 58 Ori

Q: A white dwarf star has a visual luminosity of 0.046LSun. If you were 1 AU from the white dwarf, what…

A: Ldwarf = 0.046Lsun Distance d = 1 AU = 1.496×1011 m Lsun = 3.827×1026 W

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: What star has the largest stellar parallax as measured from opposite ends of the Earth's orbit about…

A: Parallax is the apparent displacement of an object because of a change in the observer's opinion.…

Q: Which star in the table of stellar data has the largest parallax? Star distance (pc) |parallax angle…

A: In this problem, it is asking about the star which has maximum parallax.

Q: sequence

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

Q: What is the luminosity, in solar units, of a brown dwarf whose radius is 0.1 solar radii and whose…

A: Luminosity of a star or an object is the total amount of energy radiated per second by that object.…

Q: Which main-sequence star would be the least luminous?   a. A   b. B   c. F   d. G   e. K

A: Answer:) option(a) A alpha century A is least luminous because its absolute magnitude (+4.4) which…

Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0×10-12 watt/m?.…

A: Luminosity of star (L) = 7×1026 watt Apparent brightness (AB) = 4×10-12 Wm2

Q: Of the following types of stars, the one that has never been and can never be a giant star is a   a.…

A: a. Red dwarf stars

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: A star has an apparent magnitude of 10.0 and an absolute magnitude of 2.5. How far away is it?

A:

Q: is

A: The relationship between apparent visual magnitude(m), Absolute visual magnitude(Mv) and distance(d)…

Q: A certain star is 13.7 times dimmer than a star with apparent magnitude m = 3.9.  What is the…

A: We are given the ratio of brightness of stars. We are given the apparent magnitude of the brighter…

Q: Main sequence star A is 5 times as massive as main sequence star B. How do the main sequence…

A: Main sequence stars are those which fuse hydrogen atoms in their core to form helium. They have a…

Q: What is the free-fall time of a 10 MSun main-sequence star? O 100 hours 10 hours O 1 hour O 0.1…

A: The problem is based upon free fall of a star. Here the given star is having the mass 10 times the…

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: Draw an H-R diagram and dot the following question options on the diagram (using the letters given…

A:

Q: A star has a parallax of 0.2 seconds of arc. What is the distance of the star?

A: The change in the apparent position of an object with a change in position of the observer is called…

Q: The star Firefly is located 3.0 pc away. If it had an absolute magnitude of 13.0, which value below…

A: Write the given data. d=3AbsM=13

Q: You observe a star with an apparent magnitude mv=12 at a distance of 1 kiloparsec.  What is this…

A: The relation between apparent magnitude, absolute magnitude, and distance of star in parsec is given…

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

A:

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: Which of the following is least reasonable regarding stars on a Hertzsprung-Russell diagram?…

A: The Hertzsprung-Russell (H-R) diagram is a scatter plot of stars showing the relationship between…

Q: The sketch below shows an H-R diagram for a star cluster. Consider the star to which the arrow…

A:

Q: What is the size of a typical white dwarf? Group of answer choices   1.0 solar radii   0.5 solar…

A:

Q: A star has a luminosity (power output) of 9.2x1026 W and a diameter of 6.1x108 m. What is its…

A:

Q: Match the spectral type and luminosity class to the letters shown on the Hertzsprung-Russell diagram…

A: Luminosity is directly proportional to the size of the star. On the basis of temperature and their…

Q: Choose the statements that correctly describe the characteristics of the stars located in the…

A: Option-E is the correct option.

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

Q: the Sun?

A: Given: To explain the star which is white supergiant star also brightest and hottest than the Sun…

Q: Suppose a star has a luminosity of 7.0x1026 watts and an apparent brightness of 4.0x10-12 watt/m?.…

A: Given: The luminosity is 7x1026 W. The apparent brightness is 4x10-12 W/m2.