What delineates low mass stars from high mass stars? A. Low mass stars are less than...
What delineates low mass stars from high mass stars?
| A. |
Low mass stars are less than 10 times the size of the Sun. High mass stars are more than 10 times the mass of the Sun. |
|
| B. |
Low mass stars are less massive than the Sun. High mass stars are more massive than the Sun. |
|
| C. |
Low mass stars are less than 8 solar masses. High mass stars are greater than 8 solar masses. |
|
| D. |
Low mass stars are smaller than the Sun. High mass stars are larger than the Sun. |
Homework Answers
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What delineates low mass stars from high mass stars?
A.
Low mass stars are less than...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A...
Astronomers have observed a small, massive object at the center of our Milky Way galaxy. A ring of material orbits this massive object; the ring has a diameter of about 10 light years and an orbital speed of about 210 km/s . A) Determine the mass of the massive object at the center of the Milky Way galaxy. Give your answer in kilograms. B) Give your answer in solar masses (one solar mass is the mass of the sun). C)...
Which is one reason that the typical galaxy’s mass-to-light ratio (in units of the Sun’s mass...
Which is one reason that the typical galaxy’s mass-to-light ratio (in units of the Sun’s mass over the Sun’s luminosity) generally greater than 1? A. galaxies contain mostly stars much brighter than the Sun B. galaxies contain mostly stars much more massive than the Sun C. galaxies contain many more stars that shine much less brightly than the Sun D. most of the mass in a galaxy is in the form of dust E. this is an unsolved problem in...
30. Why are the Balmer lines in the spectra of giant stars narrower than those for...
30. Why are the Balmer lines in the spectra of giant stars narrower than those for main-sequence stars? 31. Binary stars are [common, very rare]. 32. Binary stars allow us to determine what very important property of stars? 33. In a binary system the center of mass lies closer to the [more massive, less massive] star. 34. What type of star is Sirius B? [main sequence, white dwarf, giant] 35. Why does a spectroscopic binary system only allow us to...
5) A star (no matter what its mass) spends most of its life Select one: a....
5) A star (no matter what its mass) spends most of its life Select one: a. as a protostar. b. as a main-sequence star. c. as a planetary nebula. d. as a red giant or supergiant. 6) What is the ultimate fate of an isolated white dwarf? Select one: a. It will cool down and become a cold black dwarf. b. As gravity overwhelms the electron degeneracy pressure, it will explode as a nova. c. As gravity overwhelms the electron...
Two stars of mass m = 0.43 and M = 15.00 (in units of solar masses)...
Two stars of mass m = 0.43 and M = 15.00 (in units of solar masses) separated by a distance d = 8.00 (in units of AU, the earth-sun distance) revolve in circular orbits about their (common) center of mass as shown in the figure below. AL What is the orbital period of the larger star in years? Submit Answer Tries 0/6
What is the reason for two stars to have the same brightness but one being 100...
What is the reason for two stars to have the same brightness but one being 100 times more luminous than the other? One of them is 100 times more distant One of them is 10 times more distant One of them is 1000 times more distant One of them is 4π times more distant The Brightness scale like the inverse of the square of the distance (1/R2) T F What is parallax? The distance of a star A method to...
5. The HR Diagram. Suppose we consider a main sequence “O star” much more massive than...
5. The HR Diagram. Suppose we consider a main sequence “O star” much more massive than the sun. According to the formulae shown in lecture: a. What is the luminosity of a main-sequence O star (in solar units, Lsun) of mass 100 solar masses? b. If the sun were a 100 solar mass main-sequence O star, how much brighter would it appear from the earth? c. What is the hydrogen fusing lifetime of this star in years? d. If the...
Hi, may I get some help with explanation? Thank you Two stars of mass m =...
Hi, may I get some help with
explanation? Thank you
Two stars of mass m = 0.60 and M = 74.00 (in units of solar masses) separated by a distance d = 8.00 (in units of AU, the earth-sun distance) revolve in circular orbits about their (common) center of mass as shown in the figure below. С. m. М d What is the orbital period of the smaller star in years?
8. [5pt] Stars in the outskirts of a globular cluser are about 46 light years from...
8. [5pt] Stars in the outskirts of a globular cluser are about 46 light years from the cluster's center, and at speeds of about 12 km/s. How massive is this cluster? (answer in solar masses) Answer: Submit All Answers 9. [5pt] A star in the Milky Way that is about 30 percent of the way out from the center of the galaxy has an orbital distance of 15 thousand light years and an orbital velocity of 222 km/s. What is...
op Plaskett's binary system consists of two stars that revolve In a circular orbit about a center of mass midway betwee...
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Plaskett's binary system consists of two stars that revolve In a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below). Assume the orbital speed of each star is |v | = 240 km/s and the orbital period of each is 12.5 days. Find the mass M of each star. (For comparison, the mass of our Sun is 1.99 times 1030 kg Your answer...
Two stars of mass m = 0.43 and M = 15.00 (in units of solar masses) separated by a distance d = 8.00 (in units of AU, the earth-sun distance) revolve in circular orbits about their (common) center of mass as shown in the figure below. AL What is the orbital period of the larger star in years? Submit Answer Tries 0/6
Hi, may I get some help with
explanation? Thank you
Two stars of mass m = 0.60 and M = 74.00 (in units of solar masses) separated by a distance d = 8.00 (in units of AU, the earth-sun distance) revolve in circular orbits about their (common) center of mass as shown in the figure below. С. m. М d What is the orbital period of the smaller star in years?
8. [5pt] Stars in the outskirts of a globular cluser are about 46 light years from the cluster's center, and at speeds of about 12 km/s. How massive is this cluster? (answer in solar masses) Answer: Submit All Answers 9. [5pt] A star in the Milky Way that is about 30 percent of the way out from the center of the galaxy has an orbital distance of 15 thousand light years and an orbital velocity of 222 km/s. What is...
op
Plaskett's binary system consists of two stars that revolve In a circular orbit about a center of mass midway between them. This statement implies that the masses of the two stars are equal (see figure below). Assume the orbital speed of each star is |v | = 240 km/s and the orbital period of each is 12.5 days. Find the mass M of each star. (For comparison, the mass of our Sun is 1.99 times 1030 kg Your answer...
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