Question

In: Physics

Suppose we discover a star which has twice the radius of the Sun and 4 times...

  1. Suppose we discover a star which has twice the radius of the Sun and 4 times temperature of the Sun. What will be its luminosity in the units of solar luminosity?
  2. Calculate the distance to a star whose stellar parallax is 50 milli-arcseconds?

Solutions

Expert Solution


genius_generous answered 2 years ago
Next > < Previous

Related Solutions

Suppose a star the size of our Sun, but with mass 5.0 times as great, were...
Suppose a star the size of our Sun, but with mass 5.0 times as great, were rotating at a speed of 1.0 revolution every 18 days. If it were to undergo gravitational collapse to a neutron star of radius 14 km , losing three-quarters of its mass in the process, what would its rotation speed be? Assume also that the thrown- off mass carries off either part a. no angular momentum part b. its proportional share three-quarters of the initial...
A certain red giant star has a luminosity of 100,000 times that of the Sun and...
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. If the apparent magnitude of the star is observed to be m=0, calculate the rate of interstellar extinction in the direction of the star. If someone could show me step by step how to solve this I would be appreciative.
Suppose we discover a new stealth planet that orbits the Sun in the same plane and...
Suppose we discover a new stealth planet that orbits the Sun in the same plane and the same direction as the known planets. The planet has a circular orbit, orbits twice as far from the Sun as Earth. The equator of this planet is perfectly aligned with its orbital plane. Answer the following questions about the new planets. Show your work for full credit. How long is a year on the new planet? Does the new planet have seasons? How...
Why does a star that has 8 times the mass of the Sun have a shorter...
Why does a star that has 8 times the mass of the Sun have a shorter lifetime on the Main Sequence than a star that has a mass of 2 times the mass of the Sun?
A star has a surface temperature of 10,000 Kelvin and a radius 3 times that of...
A star has a surface temperature of 10,000 Kelvin and a radius 3 times that of the Sun. If the apparent magnitude of the star is 11.5, what is the distance to it? If someone could show me step by step how to do this, I would be very appreciative.
a) An asteroid revolves around the Sun with a mean orbital radius 2.5 times that of...
a) An asteroid revolves around the Sun with a mean orbital radius 2.5 times that of Earth’s. Predict the period of the asteroid in Earth years. (Show all work, including formulas and units for full credit.) b) Saturn requires 29 years to circle the Sun. Find Saturn’s average distance from the Sun as a multiple of Earth’s average distance from the Sun. (Show all work, including formulas and units for full credit.) c) The Moon has a period of 27.3...
Given that the USA is twice as good at making clothing, and 4 times as good...
Given that the USA is twice as good at making clothing, and 4 times as good at making food as Vietnam and they trade, who wins, and who loses according to comparative advantage?
Suppose the Earth were a 0.10 Mʘ companion star to the Sun, but still orbiting with...
Suppose the Earth were a 0.10 Mʘ companion star to the Sun, but still orbiting with a semi-major axis of 1 AU about the real Sun. What would some alien astronomer measure the spectral line splitting width to be of the blue-green (λ=490 nm) line in the Hydrogen spectrum of the Sun? Express your answer in units of nm
An alpha particle is a nucleus of helium. It has twice the charge and four times...
An alpha particle is a nucleus of helium. It has twice the charge and four times the mass of the proton. When they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed of 0.005c, where c is the speed of light. What is their distance of closest approach? Hint: There are two conserved quantities. Make use of both of them. (c = 3.00 × 108...
An alpha particle is a nucleus of helium. It has twice the charge and four times...
An alpha particle is a nucleus of helium. It has twice the charge and four times the mass of the proton. When they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed of 4.1×10-3 c, where c is the speed of light. What is their distance of closest approach? There are two conserved quantities. Make use of both of them. (c = 3.00 × 10^8...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT